Pro: Swift police response in case of actual alien.

Con: Over a dude going for a walk on stilts, stopped by cops for crime of walking down street, when the crime rate for Britain, in general, suggests that crime isn't lessening, nor are all these cameras doing anything to deter crime or convict criminals compared to the sort of measures that allow people who are different from normal to walk down the street in whatever clothes we like.

I remember in college I was in the Shotokan Club, and I had to practice out at night on the grounds, and some security guard called the campus cops on me because it looked like I was doing something violent. You know, practicing karate in a park...


Ick.