More importantly, blocking someone on Twitter prevents them from evoking your Twitter handle or retweeting you. So, in the President's case, if someone is retw

More importantly, blocking someone on Twitter prevents them from evoking your Twitter handle or retweeting you. So, in the President's case, if someone is retweeting him and criticizing his words, or calling him out by his Twitter handle in a way that he doesn't like, he can block them and literally prevent them from posting certain content about him. This is mindbogglingly unethical.