It's illegal to perform in many states but I don't think research of it is.
Isn't it illegal in Canada though? I saw a story where a guy got arrested trying to enter Canada because he had furry on his laptop and they determined that it was close enough.
That or he was sent back.
There's a border policy to have the means (cash) to survive AND have a definite time set for when you're coming back.
The dude didn't have the money to stay in Vancouver, and he didn't give a definite time set. If you stay too long, you go from being a tourist to an illegal immigrant.