Just want to make it clear that I'm from NYC, so don't know other states laws. But if you're over 18, living with your parents (or boyfriend) for more than 6 months plus if you have state ID stating you live at that address (doesn't hurt), it's your legal right to be legally evicted. NOT THROWN OUT! It's the law! (Trust me, I went through it) Anyway, your parents would have to go to court to kick you out. And if they change the locks, call the cops! They legally can't do that. They can change their locks only after you're legally evicted! BTW, it doesn't matter if you don't pay rent.
Hope this helps someone

SeXxyRusSian212, thanks, but try to avoid dragging up 2 year old threads, especially when they don't quite apply, such as the state.
NY has some of the most tenant friendly laws in the US, while FL has the least.

I moved the last two posts from here.

Stan, as Joy noted, "dragging up 2 year old threads" is a waste of everyone's time.

I have, in the past week or so, researched the issue of changing locks on a non-tentant (no agreement to pay rent) in Florida. The thread is here. There is nothing to stop the property owner from doing that, or otherwise doing everything possible (other than physical violence) to "kick out" an unwelcome houseguest. I don't know that to be the same in New York, but see no need to research it now for what is essentially an "academic question".

There are 100's of people, illegally evicted every week. No it is not legal to be 'thrown out" but in almost every city in the US. The police will not do anything about it, it is not a criminal issue. It is not against criminal law. It is civil law. So the person, thrown out, may sue in court for damages.

The home owner may just tell the police NO, if they say to let the other person in. There is nothing the police can do, they merely threaten because they think it will scare the person.
The homeowner merely tells the police officer unless there is a warrant, or unless he has proof of the statue of criminal law. That the police officer is to get off his property also.