They weren't banned, as they were never one of Fanpop's new updates. It was a glitch that allowed people to mettre en ligne gifs as icons, but it's been solved now.
It was a glitch fanpop made thinking people were able to use GIF's as there icons, but almost two days il y a was when the administrators stopped people from using them. This was never a new feature, it was an accident that they did.