February 24, 2005OP-ED COLUMNISTSwifties Slime Again By MAUREEN DOWD ASHINGTON Instead of trying to destroy AARP, Republicans should be signing up the seniors' lobby to find Osama. AARP's super-relentless intelligence network is certainly better than that doddering C.I.A's. Osama has to have turned 50, and AARP somehow knows where everyone who has turned 50 lives. But no. The same Republicans who used to love AARP when it helped them pass the president's prescription drug plan now hate AARP because it is against the president's plan to privatize Social Security. "They are the boulder in the middle of the highway...