We’ve seen SkyWatch — those E-Z-assembly conning towers NYPD erects to get an overview of troubled neighborhoods — in many parts of Brooklyn, including Dumbo, Prospect Heights, and Gerritsen Beach. They usually go up when and where crime is perceived to be a bigger problem than usual. Today NYC the Blog spots one on… Canal Street. NYCTB wonders “if they might be keeping an eye on the street vendors in the area selling Gucci sneakers on the cheap.” We’re thinking pickpockets and vehicular homicide. Or maybe, Canal being as crowded as it is on weekends, it’s just been installed for patrolmen can occasionally get a breath of fresh air.