First I was thinking about posting in ideas-wanted, then I realized it was my
idea and probably just bullshit anyway...
Here goes: Party with one or more members above level X enters the room where
lowbie-eq-monsie Grabllahgagh is:
Grabbllahgagh the midbie-eq-monster sniffs the air then yells 'Eeeeek, I smell
highbies!!!!' and runs away to hide himself and his Famous Red Ring of Midbie
Power!

Later on the very same night Gloffleh the Human midbie tank <midbies-are-us>
experiences 'Your Famous Red Ring of Midbie Power suddenly bursts into a
gazillion pieces as your finger grows a little bit thicker' when Gloffleh
gains 1234 exp from killing a smurf and Gloffleh's total exp worth reaches
Y+(random(z)).

Now, in my twisted imagination something like that in combination with
Blackstar's idea "You can't wear this thing, you unexperienced piece of
midbie-wannabe piece of shit" could force midbies to try making their own EQ
and prevent highbies from raping monsies not designed to them.