Anyway - people who attack cameramen very often say "What you're doing is illegal - I didn't give you permission to record me." - not, "Please don't record me, I would appreciate not appearing in your video." There's a HUGE difference here. They have every right to record you in public view, and you can ask nicely to avoid being caught in their view. This does NOT include threatening violence. What gets me is you only care about the 1 camera out of hundreds because there's a person behind it you can immediately see.
You are exactly the type of person who needs Civics.
Side note: If drones become a problem for hikers I expect to see certain areas like state parks adopt rules about drone usage to curb bad behavior. Hopefully such bans on drone operation will be carefully enacted, as drones have done a LOT to enable new perspectives on tired landscapes.