[3] In 1992 defended his Ph.D. thesis "Prose of Daniil Kharms",[4] in 1999 – his doctoral dissertation "OBERIU Poetics in the Context of the Russian Literary Avant-Garde of the 20th Century".

[26] In 2009, Kobrinsky went to court to lift the ban on the entry of cars to Kamenny Islands (this place is known for its super-expensive real estate and government dachas).

In March 2011, among 45 representatives of the Russian intelligentsia, he signed an appeal to Amnesty International with a request to recognize Mikhail Khodorkovsky and Platon Lebedev as prisoners of conscience.

[40] In July 2011, together with Boris Vishnevsky, he wrote a response to an appeal by a group of figures close to Right Cause, “There is a Choice,” titled “It’s time to choose good!”, in which he sharply condemned the authors’ attempt to rely on Dmitry Medvedev as an alternative to Vladimir Putin.

[50][51][52] Among other deputies, Alexander Kobrinsky spoke out against the so-called "Dima Yakovlev Law", which prohibits the adoption of Russian children in the United States.

[69] On August 6, 2015, Alexander Kobrinsky was the first to turn to the police with a statement about an act of vandalism: a high-relief depicting a demon (known as "Mephistopheles") was knocked down from house 24 on Lakhtinskaya Street (built by architect A. L. Lishnevsky) that day.

[78][79] In January 2020, the Internet resource "People's News" (Narodnye Novosti) and a number of other resources that are part of Yevgeny Prigozhin's "Patriot" media group.,[80] published messages about Kobrinsky's alleged correspondence with a certain girl, in which the professor allegedly made obscene proposals to his interlocutor[81] In October 2020, the Kholod online publication published an investigative article by Sonya Volyanova “The Brilliant Professor” about Kobrinsky's sexual harassment of female students of the Herzen University, the names of almost all the girls in the publication have been changed.

[87] After the publication of the article, the Bureau of the St. Petersburg branch of the Yabloko party refused to conduct its own investigation,[88] since Kobrinsky had already filed a lawsuit for the protection of honor and dignity.

A group of four party members (Igor Kochetkov, Anna Boeva, Darya Besedina, Guzel Leman) organized a commission to verify the published information.

Members of the working group talked to the authors of the material and the girls who made claims (also without naming them), and, according to a report signed by Kochetkov and Boeva, they could not “find grounds to consider false the information told by the girls in the article”[86][89][90][91] In December 2020, Kobrinsky filed a lawsuit against Kholod journalist Sonya Volyanova, as well as the publication Narodnye Novosti, to protect honor and dignity.

[92] The editor-in-chief of Kholod, Taisiya Bekbulatova, notes that the cause of the lawsuit was descriptions of episodes of violence against two girls, but the court decision also refers to many other charges, in particular, accusations of sexual harassment are refuted.

[93] In December 2021, the Petrogradsky District Court of St. Petersburg satisfied Kobrinsky's claim, requiring both defendants to publish retractions and pay compensation.