It can also manifest itself on teleports done wrong, where multiple players get stuck.
There is an own feature vote for it: http://dplogin.com/dplogin/featurevote/feature.php?id=10230
which would be a waste of time to work on...
It's for jump servers mostly. And what's up with "no shooting" part? I only mentioned no collisions with other players.
If player collision is disabled, you wouldn't be able to shoot players, either.
Give people ability to make mods and problem solves itself - somebody will write it.
Paintball2-AimBot, Paintball2-WH, Paintball2-SpeedHack - that Will be names of this 'mods'.
for alternate meaning of "mod". Besides, this would be a server side mod, and not a client side one.