I suppose it depends on the circumstances.
After studying it (I was obviously too young to be alive) I have absolutely no respect for the protestors of the Vietnam War. Especially their dispicable treatment of returning soldiers. Sometimes police brutality isn't enough.
And I had little respect for Cindy "The men who blew my son to smithereens are Freedom Fighters" Sheehan.
But protesting is an essential right. While it is overused, and it can have terrible effects (like helping the Vietnamese outlast America), it's still our right.
I guess people should use it responsibly, but it's one of those rights that should have little restriction as long as its peaceful.
"Compromise, hell! That's what has happened to us all down the line -- and that's the very cause of our woes. If freedom is right and tyranny is wrong, why should those who believe in freedom treat it as if it were a roll of bologna to be bartered a slice at a time?"
RIP Jesse Helms