It's certainly become popular on blogs and on Twitter to create "fake" satirical versions of various famous people. These are usually humorous (or they try to be) over-the-top representations of these celebrities. Usually, they are quite obvious, even to the point of saying that they are "the fake so-and-so" or clearly stating in the bio that this is fake. There should be no confusion around such things. However, a journalist in India who created a "fake" satirical Twitter profile for Indian politician Shashi Tharoor has found herself banned from Twitter
without any explanation or chance to appeal. Now, obviously it is Twitter's right to decide whether or not to shut down certain accounts, but you would think with such an obviously fake profile that the company might be a bit more careful and, at the very least, communicate with the account holder about the issues with the account before just shutting it down.