Mayor Bloomberg says the city "acted appropriately" while arresting and holding thousands of people during the Republican convention. I beg to differ. I wasn't even a demonstrator - I was going for a drink with a friend when I was arrested - and my experience tells a different story. It was Tuesday, Aug. 31, about 8:30 p.m. when my friend and I saw a lot of cops running on 26th St., then up Park Ave. South. I saw a man being handcuffed who said he had done nothing. The cop was using a lot of force, and I asked him...