Bushman is the current reigning champ of Fisherman's Wharf. I do miss the Human Jukebox, Grimes Poznikov, who died too soon in his 50s not long ago.
I'm afraid that this gentleman's antics are hilarious only when the public humiliation is happening to someone else. Unlike Bush Man, most people get over the titillation of jumping out from behind things and scaring others some time around first grade.
I encountered the "bushman" in the Fisherman's Wharf area on a recent trip. He got a smile and a laugh but nothing more. Yes... his tactics are a bit childish, but I can't say that he "spoiled" the experience at all. Just give him a laugh and a bit of change and just keep stepping. There's far too many other things to see and do to focus on his antics.