People've been doing that shit forever. Until those pictures I hadn't seen nor heard of anyone doing 270 onto a double kink urban rail, much less all the other shit that went down, which is way sick. I've seen Tanner nollie onto a handrail like 4 years ago, and numerous people since.
And about the rail being closed, I think that piece of metal was just welded on or something because the stairs were closed... Nothing to important with it. just a guess though.