[very tongue in cheek!] you could try killing off a few of the faculty and leave them lying in place of the pens with no caps as a lesson to the rest . . .?
Seriously, a lot of well placed notices suggesting they cap the pens or else - what is it doing to your departmental budget? - after all these pens are not cheap even if you do bulk buy!

Jackie
www.iqps.org
DeskDemon Forum Board Staff