Freezing, one anime title that is currently airing on Tokyo MX
The February 12th issue of Weekly Gendai published an article that Tokyo MX might self-regulate in terms of airing anime titles due to the recently passed Youth Ordinance Bill because of its ties with the government, to be exact, 4.1% of the stocks of Tokyo MX are held by Tokyo Metropolitan Government. Aside from that, this is the only station that Tokyo Governor Shintaro Ishihara airs his press conference who is responsible of the said bill.
Weekly Gendai's source at Tokyo MX added, "We are popular among students as a station known for its strong presence of anime," but the station may have to reconsider hiring anime fans among new graduates.
For example, the job application sheet may have the question, "If you were to take a foreign friend sightseeing in Japan, where would you take him or her? If the student were to write "Akihabara," the station might ask him or her to leave the application process.
Even if they will regulate the amount of ecchi anime titles, it doesn't mean you can't watch the said late night anime content because there are other stations who can air it in Japan such as Chiba TV, TV Kanagawa and TV Saitama. So those who are watching Rio- Rainbow Gate! or Freezing via keyhole, don't worry!
Source: Karubi, Yaraon! via ANN, MyAnimeList