I entered the Petrifighter map today from FM and noticed that none of the monsters were moving. I could still attack/kill them, and the ones that respawned were walking around like normal. I vaguely remember something like a 'lag hack' existing back in the day which would cause this effect. Might be worth looking into if it's not already covered by the autoban... I recorded a video, I could upload it if necessary.
I noticed non of the petris in ch1 are moving, well, when i was there for the last hour standing afk.