So, let's say you are sitting in your living room, and you look out your window to see police officers beating defenseless children with their batons. Perhaps you see them urinating on them. Or, maybe waterboarding them on the back of their squadcars. Anyway, imagine any scenario where the police were acting in a way that could be seen as criminal or a violation of civil rights. You pull out your cell phone and begin recording. In Illinois, and elsewhere, you would have been committing a felony. The police would have had the right to demand that you cease recording, take your phone, and arrest you. The US Supreme Court refused to hear an appeal saying that was no longer the case. This is a big deal, and thankfully the right decision.