I did not have any choice but to watch it either, since the parade route always disrupted traffic near the convention center (and blocked access to the various hotels I stayed at while attending a very well known annual computer related convention for work).
What shocked me more than the guys walking around with nothing on but chaps, or the floats of bare breasted lesbians with their nipples chained to one another (all of this going on at about 2pm by the way) was the cops just standing there next to idiotic parents with children, seeming to enjoy the disgusting spectacle.
What exactly were you doing in San Francisco?