"Are you sure the ones playing have armor? so its not just some thing you see when you are in spec ...i think i have heard this before"
I have only been told by server Admins, and have watched the demo's supplied, by them.
in the demo, you can see where they(the player) starts from spawn, without armor. but once a health pack is picked up, they get full health and full armor. then, when killed, they respawn without armor again, most of the times these players are unstoppable, and at other times they cant seem to play fer crap. seems like they can toggle something. I am told.