"iRue The Day" - iCarly
This "controversy" was a bit much and mostly seemed like an overreaction from the network heads at Nickelodeon. "iRue the Day" involved a character, Nevel, who blackmails Carly and her friends after hacking into her website. The episode was aired in 2007 but pulled from the network in 2014 due to the Sony hack. The network was afraid that the episode was "glorifying hacking." The episode was quickly put back into syndication.
"The One With The Lesbian Wedding" - Friends
A major plotline of Friends is that Ross's ex-wife, Carol, gets married to a woman named Susan. Now, Ross has to co-parent with a lesbian couple, making them a very blended and progressive family. The wedding of Carol and Susan was banned on NBC just because it was a lesbian wedding. This was the first banned lesbian wedding on TV.