Krol served as the main spokesman for the People's Party for Freedom and Democracy (VVD) in the House of Representatives from 1978 until 1985.

On 4 October 2013, de Volkskrant published an article alleging that Krol withheld pension money from his employees from 2004 until 2007, and then again in 2009, while working for the Gay Krant.

[3] De Volkskrant said that the tip-off leading to the article had come via Publeaks NL,[4] a new Dutch anonymous whistleblowing initiative.

[7] He was elected with preferential votes for the Ouderen Appèl party to the municipal council of Eindhoven in March 2014.

[11][12] In the 2023 general election, Krol was the second candidate of the right-wing to far-right party Belang van Nederland, but did not win a seat.