First I would like to briefly address the "shoes on wires" urban legend (check out the online urban legend experts-- http://www.snopes.com/crime/gangs/sneakers.asp ): I am originally from Philadelphia, Penn. The story I heard growing up is that kids would throw their school shoes on the lines at the last day of school as a celebration of summer. This is the story I shared with my kids and it was in this spirit that they threw shoes on the lines.
There were no devious intentions involved. (and I can assure everyone that in the 2-3 years the shoes have been there not a single drug dealer has come knocking)
I understand the concern about crime. When we moved in 4 1/2 years ago (before I had teens) I was warned of the petty crime in the neighborhood and in fact had several bikes stolen, front arbor toilet papered, and CD player taken out of my van. It makes sense given the proximity to the high school/pizza place as well as the huge discrepancy in incomes within a small area that some crime would bleed into the neighborhood.
However I also firmly believe that there are other ways to create a safe friendly neighborhood than sitting at the window looking at anyone who's "different" with suspicion and stereotypes, with the police on speed dial. I have chosen to be involved in the lives of local kids, giving them a safe (alcohol- and drug-free) place to hang out (there is not a lot for kids to do in this town--especially for families without unlimited money/time), which gives me a chance to get to know my kids' friends, as well as give kids a place to go, adult supervision, someone to talk to about their problems, etc. I know there are a few bad seed out there but by and large they're good kids who need our support and guidance, not our suspicion and judgement.
I also know that us parents need all the support we can get. It is in this spirit and belief that I'm starting a group for parents/kids ages 12-17, both so parents can get together and talk about issues we're dealing with and the resources available, and to find/create positive outlets for our kids. This is not a place to gossip about our neighbors/their kids (apparently that's what the neighborhood watch meetings are for) but a place for positive solutions. If you are interested and/or have resources to offer, come talk to me. I live in "the big green house".
I believe if the neighborhood--and the community at large--can reach out to the kids it will do as much to reduce petty crime as anything else. Talk to the kids, get to know them, show an interest. Respect them and they will respect you. Have a community clean up day and any kid who volunteers can attend a block party...there are positive solutions out there for those that believe it takes a village, not a police state....