The ceiling tokens are old spawns, no more are gathering. The bigger problem in the proving grounds however is hackers, I've seen avatars rapidly warping between the three spawns, this may explain how avatars are able to escape. Biller here is guilty as well, on several occasions he has warped straight to me, these hacked client positions give a unfair advantage and I'm amazed that there is no server side prevention. I've put in a support case on Biller, but this is a situation much larger than just one avatar.