Thank your local professional protesters for this cost. If they displayed a moderate amount of civility and common courtesy the environment wouldn't feel unsafe to city workers. You can disagree with others, even disruptively, without ratcheting up tensions to the point where people fear for their safety.

And for the record, being an obnoxious asshole is the quickest way to have your opinion ignored. If you want to be heard and taken seriously, hone your message, unite and organize, and then use that clout to sway policy. For fucks sake, when did democracy get so retarded?