Why aren't you guys using vote-kick for this? Someone using /follow, SCH or not, can be assumed to be AFK. You can't stop a SCH from manually running and not healing, but at least you're forcing them to actually sit at their screen for credit.

Seriously, if everyone just started kicking SCH who do this, you would see the problem vanish as they would stop getting their roulette credit and bonuses. The community just has to take collective stand against it.