Yeah, I’ve encountered him before and he’s belligerent and aggressive, won’t listen to reason and really doesn’t like bikes.
Plenty of people (non riders) have mentioned him as well, he’s well known to the rangers and a lot of the locals and generally he’s ignored.
Thing is.. He only needs to moan in the right ear once, and it could cause a lot of access related grief. I’ve seen similar things happen in other local spots, and some of the rangers aren’t particularly happy about the number of riders up there anyway.