Very scary! All it's going to take is for 1 instance (such as the above) to go horribly wrong, sparking world wide rioting. The consequences don't bare thinking about.
Looks like an example of a Forward Intelligence Team at work. http://en.wikipedia.org/wiki/Forward_Intelligence_Team
I’d take loads of hypodermic needles to a demonstration and make sure the filth knew they were about... just drop a few near their lines. Watch how how brave the bully boys are then