As far as the police NOT being at the library enough, Enumclaw police are ALWAYS at the library. Just like the article says, the library staff will NOT co-operate with the police. I guess this falls into the same mentality as the "sanctuary city" policy. Seems to be the latest thing where  local government sides with the criminals and NOT the law abiding tax payers who pay the bills to keep the library running. I stopped visiting that library about 3 years ago because I was tired of the riff-raff just hanging around the place. 
By the way, I work in Kent and the Kent library is at least 10 times as bad as Enumclaw and the staff at the Kent library is the same way, they turn a blind eye to the "homeless" sleeping, defecating and urinating on the side of the building, openly looking at porn on the computers, dealing drugs etc. WHY is it that King County government just does not care about this criminal activity? Are they hoping to create a larger crisis so they can get more funding?