I disagree. Sure a lot of people aren't watching this. But a lot of freepers will pass around pics of this event to people they know via email. People will get the information. This sort of stuff is what got Nixon elected. The silent majority doesn't like freaks. Take a look at what happened with the gay marriage amendment here in MO.
Gee, I wonder how Security is at this event? Could someone walk down the street with a bomb strapped to them?
Send images to friends and family, host them on websites. Then when lefties do "Peace march" image searches, they will see the profanity signs, etc. Middle of the roaders will be swayed.