Cosplaying the CIA-backed colour revolution faction, curious...

Seriously though, doing urban exploration in military gear (even imitation stuff) is probably a bad idea in general, but especially when you're actually at war. I guess the FSB were just like "dudes hanging around a power plant, shoot 'em", and then tried to pull the saboteur thing post-facto, like American cops claiming "he was totally going for a gun" after shooting some guy in the back.