I have not checked my Klout score, and indeed until just now had no idea what Klout actually was. When I looked at Klout's homepage, it requires a Twitter account to search for someone. I don't use Twitter and I know I'm not the only one, so I think this is pretty bogus as far as a reputation measurement goes.
I don't know how how this guy has decided that means I'm in an online minority, but I do know that his Bartonphink score just took a dip.