When it is warm, I take my 3 children down to Pearl Street to have lunch with my husband on Friday's(his office is on Pearl). It is a beautiful street, great view of the mountains, kids play in the fountain, however, on more than one occassion, they have seen people and things I wish they hadn't. Lots of pan-handling and people who look like they belong in a mental institution. The beauty of the street and the crazies who inhabit it are in great contrast.
My son lives in Cincinnati and it's ten times worse there. I wish I knew the answer.
Consider yourself lucky to be in CO.......and I am sure I don't have to tell you to keep a VERY close eye on your kids.