That's an interesting idea with the 0 followers.
Bolas can be a pain, but so can mages that dump and run when they are out of mana, or dexers that continually offscreen. You should be able to kill a person's mount. Not sure why you can't attack the mount when someone is riding it, since a hally chop to a horse's legs or a spear to the horse's chest was part of combat back then.
Then there's the kirin guy. I should be able to kill that mount to protect from the chain lightning special effect. People that ride real mounts or use faction warhorse for half the remount time (I believe) don't have too many issues with bolas unless they are being ganked. That's a bit of another issue though. Lot to think about.