People follow you to see something cool, so I take that away from them. If I get a pew-pew-paparazzi, I simply tell them. "If you're going to follow me, then you're going to watch me sit on defense at this node. You're not helping us win by following me around".

I'd say that works about 60% of the time. I also follow that up by reporting them as AFK on 3-4 characters so that they have to go move and fight something...