Why Are Liberal Mayors Kicking Out Occupy Groups?

Everywhere you turn, liberal mayors are kicking out the Occupy (name your city) out of the local parks, plaza and other public places? San Francisco, Seattle, Washington D.C., New York City, Boston etc have all kicked out the Occupy groups and drastically changed the rules. The mayors tell the conservatives/constituents that they are law and order but they really were not. The Occupy groups out stayed their welcome.
When the Occupy groups started they had some support of the people and the Occupy had some legitimate beefs. Of course, as time went on, it turned out that the groups were made up of labor union, liberal groups, anarchists, homeless, rapists, runaways drug users and other thugs and that the Occupy group has lower ratings than Congress and Charles Manson, so the mayors don't get any political benefit from them anymore.
Further, with the 2012 elections coming up, the liberals don't want to be associated with this thug Democratic group. Think of all the juicy commercials the GOP can run, exploiting the Occupy thugs and their actions. Beating up cops, doing drugs, beating up more cops, causing traffic jams, beating cops, demanding people pay for their expenses like college loans, demanding that cities give them free land etc and beating up cops.
So, the Occupy group was first loved by the liberal mayors but when the Occupy popularity left, the liberal mayors turned on the group.
I guess this is what Democracy looks like.