Roadside in front of some townhomes in Phoenix, Arizona is this sign: No Trespassing – Private Property. This warning is becoming more and more prevalent as if the gates and seven-foot-tall cinder block walls weren’t enough to keep out the undesirables. Does anyone actually know to who these signs apply? I know the residents are welcome, I’m sure law enforcement need not heed the exclamation, and I’d bet that residents’ visitors are allowed, so I guess the exclusion applies to me and my ilk.