Ninjad from the WoW Forums, sry if its been posted here already or if this was someone who frequents here idea, but its a good point.

There is an option currently @ GameMenu>Interface for "Block all Trades".

Why not institute a "Block all Follow Option"?

If the toon attempts a second time to follow Anyone in that battleground, they will be instantly afk'ed.

And to prevent Griefing, the second attempt shall not register upon the screen of the second toon.

If this is part of a long pattern of behavior, then they will be banned.

Banned via the auto-filter, which many Multi-Boxers are probably familiar with recently.