
Quoting
John_28
My point is that the police are stating your rights, and the police are not lawyers. The OP was telling his friends what their rights were, and he was arrested for that. Someone here implied that police arrested the OP for practicing law without a license.
When police read you your Miranda rights, they are practicing law without a license. When your driving instructor tells you to stop at a red light, he is practicing law without a license.
Let's not kid ourselves here. The police arrested this guy because he was telling people that they had a right to not answer questions. There was no illegal obstruction on this guy's part.