To clear things up:
The rail has not been taken down, and when it finally does go, it is has nothing to with the fact that its a gnarlier urban rail that vail doesnt want people to hit. It has to do with construction and development of the new peak 8 base area of breck. There will be new lodging buildings, parking garages, and shops all up in the area that will form a courtyard just like that of Keystone and the Peak 9 base area.
As far as security in the area, I work at One Ski Hill at peak 8 and know most of the security in the area, to be honest, its pretty easy to go and hit that rail. No one is usually around at all in that area during the off season. I tried to recognize the person's voice in the video kicking them out, but it doesnt ring a bell. It was def not security. Sounds like it was someone who was working in the area and was just being a dick not minding his own business.
Most of the urban up there is fair game. No one is around up there after the mountain closes. Ive seen the stept crew up there for awhile hitting the rail that drops off the parking lot and no one bothered them. Have fun.