Gary, well said.  Somehow many people think Kesey Square is the magnet for all the downtown troublemakers.
Tonight after our history program at the Eugene Public Library I walked around downtown for a while, making a point to walk through Kesey Square and pat Ken on the head for reading to his grandkids.  
Though it  was a "dark and rainy night" there were quite a few people on the streets, and quite a diverse group they were.  Many were what would be labeled "normals" of all ages,  with the majority  younger and "student types."  Some cheerful nightlife.
On the other hand, yes, there were those we'd call disreputable, and several  rather pathetic looking wet young people.  Certainly some folks I wouldn't invite home.  However, I never felt unsafe or hassled.  As usual, the most of the  negative clusters were around Broadway and Olive. As for Kesey Square, no problem, just one miserable soul who seemed to have  fallen asleep selling his jewelry.
And Kesey looked on and smiled.