If it is for the better, than yea i would, . But if it was just to tick off someone and put peoples' lives in danger than no way.
This isn't really breaking the law, but I knew someone that sat in front of an Army tank so it couldn't pass, because long ago at my School the Army would bring tanks and etc. to try and recruit kids. She sat in front of the tank and people started joining her, i think she got arrested for disturbing the peace, (it started to get pretty out of hand from what I'm told, she was trowing stuff like eggs at the tank and the personal on the tank.) but I'm not sure, I know she got suspended for a day for ditching class.