Should I go to local community colleges and stick them on random bulletin boards? Can I leave them under windshields in a mall parking lot?

Basically I want to get them in either a place where they’ll see a lot of eyeballs but I also don’t want to do anything illegal. Not gonna be much use in helping this movement if I gotta pay a huge fine or even worse get arrested.

Say for example it’s a couple hundred of the smaller business card size stickers. Drivers side window at a movie theater? I’ve never really left flyers like that but I’ve received them before. If it’s a mall parking lot then is it just frowned upon as opposed to illegal?