[BLEEDING] Something quick against "magnet".

"Magnet" refers to a player seemingly freezing other nearby players onto
the spot, causing them to yaw-glitch, seemingly getting attracted by the
cheater.

Thanks again @Iceee for reporting and @Amaranth for finding cause +
suggested fix.

Not sure this both helps and prevents false positives, so it could get
redone a couple of times, might also result in being impossible to fix
with a plugin in an acceptable way.