The Strasbourg-based court unanimously ruled that by banning three Moscow Prides in 2006, 2007 and 2008, Russia breached three articles of the European Convention on Human Rights.

On 11 April 2011, five judges panel of the European Court dismissed Russia's appeal and the verdict on illegality of Moscow Pride bans came into force the same day.

[6] He took part in Gay Pride parades in different cities of the world: London, Paris, Zurich, Geneva, Turin, Vancouver, São Paulo and Warsaw.

[13] In June 2009, French TV channel France 4 aired the programme "Global Resistance" featuring an 11-minute report about the activities of Nikolay Alexeyev and his fellow activists from Russia and Belarus organizing first Slavic Gay Pride in Moscow on the day of the Eurovision Song Contest final on 16 May 2009.

[14] 2011 Australian documentary by Logan Mucha features the attempts to organize Slavic Gay Pride in Minsk, Belarus, in May 2010 and the role played by Alexeyev.

[20] This research was published in his 2002 book "Legal Regulation of the Status of Sexual Minorities: Russia in the Light of International Organisations' Practice and Legislation of Other Countries".

[citation needed] In October 2002, Nikolay Alexeyev authored a report titled "Curbing Prostitution: Western Experience and International Law" ordered by former State Duma Deputy Alexander Barannikov.

In 2003, Alexeyev authored a comprehensive research dedicated to the history and contemporary reform of the upper chamber of British Parliament "House of Lords: From the Court of King Egbert to the Revolution of Prime Minister T. Blair (825-2003)".

[28] Since 2005, Nikolay Alexeyev earned his reputation in gay activism as a person who would not compromise on his ideals and who will not give up on his fights for LGBT rights in Russia and other countries.

The leading French gay and lesbian magazine Tetu called him in March 2009 "l'activiste le plus acharné du continent" which could be translated into English as "the most stubbornly persistent activist on the continent"[32] In December 2010 leading American gay magazine "The Advocate" called Nikolay Alexeyev "the most visible crusader in his country".

On 1 August 2010 he was a grand marshal of Vancouver Gay Parade, heading the march in white navy uniform with the logo of Moscow Pride.

[44] Nikolay Alexeyev is known to be a personal friend of German Bundestag member Volker Beck, British gay rights activist Peter Tatchell, President of IDAHO Committee Louis-Georges Tin, writer and Oscar Wilde's grandson Merlin Holland.

In the final round of the show a scandal started after Nikolay Alexeyev called Alexander Chuyev "gay, coward and hypocrite".

[54] On 17 May 2010, the International Day Against Homophobia, Nikolay Alexeyev took part in the program "Chestnyi ponedelnik" on NTV which was dedicated to sexual minorities in Russia.

Nikolay Alexeyev answered a question from a journalist from the Russian news agency Interfax who asked "And what the gay community is planning in Russia?"

[67] Moreover since that time the creation of media interest around Moscow Pride became strategy of Nikolay Alexeyev which he wanted to use in order to attract maximum attention to the LGBT rights in Russia.

Uncompromising fight for the conduct of Moscow Pride through banned public manifestations and rigorous legal work based on court appeals against all bans of LGBT public events up to European Court of Human Rights helped to elevate Nikolay Alexeyev to the position of an informal leader of Russian LGBT community, the way he is frequently called by Russian and foreign media.

Nikolay Alexeyev is one of the main ideological opponents of former Moscow Mayor Yuri Luzhkov, who called gay parades "satanic gatherings"[74] and the participants of such events as "faggots".

One of the Russian leading daily newspapers "Kommersant" wrote ironically after the incident in London that "Sergey Tsoi tried to take over the gay movement flag from Nikolay Alexeyev".

In January 2010 Ministry of Justice denied to register the organization citing a number of reasons and giving the reference to the Russian Family Code which defines that the marriage is based on the union between a man and a woman.

During several years Nikolay Alexeyev and his fellow activists campaigned for the repeal of the ban on blood donations by homosexual men which was imposed in the regulations of the Russian Health Ministry.

[103] Nikolay Alexeyev consistently supports criminal prosecution of politicians, officials and public figures for the incitement of hatred towards people on the basis of their sexual orientation and gender identity.

In August 2010, after his trip to Vancouver and Whistler, Nikolay Alexeyev announced the plans of his organization to open Pride House of LGBT during Sochi Winter Olympic Games in 2014.

The closing press briefing of the conference, which took place three hours before the Moscow Pride, attracted more than 100 journalists and 18 TV crews, giving an unprecedented media tribune both to gay rights in Russia and the IDAHO.

In February 2009 he played a key role in the recognition of the IDAHO in Luxembourg, convincing Jean Huss, a local MP from the Green Party to introduce a motion in Parliament.

As of January 2011, Nikolay Alexeyev had over ten complains against Russia filed and pending at the European Court of Human Rights (Strasbourg, France).

On 14 February 2009 he, together with other Russian, Belarusian and French activists, organized a protest in the centre of Strasbourg to denounce the inaction of the European Court in considering the legality of Moscow Pride bans.

As of January 2011, Nikolay Alexeyev had one complaint pending at the UN Human Rights Committee concerning the ban of a picket in front of the Iranian Embassy on 19 July 2008 in Moscow.

[citation needed] On 15 September 2010 Nikolay Alexeyev was arrested at Domodedovo Airport in Moscow as he was boarding a Swiss Air Lines flight to Geneva.

[123] This was in response to an article by Lucas describing Alexeyev as the Kremlin's "pocket gay" who "can no longer be trusted as an advocate for LGBT Russians".