Makes you wonder what it is they're protecting: Officially, the Secret Service does not concern itself with unarmed, peaceful demonstrators who pose no danger to the commander in chief. But that policy was inoperative here Thursday when seven AIDS activists who heckled President Bush during a campaign appearance were shoved and pulled from the room -- some by their hair, one by her bra straps -- and then arrested for disorderly conduct and detained for an hour. After Bush campaign bouncers handled the evictions, Secret Service agents, accompanied by Bush's personal aide, supervised the arrests and detention of the activists and blocked the news media from access to the hecklers.