You should try answering phones at one of those pledges. I've done it several times. Every pervert in town calls up to try his line on some unsuspecting volunteer.
I used to bring the local S.C.A. to answer phones. We had a man named Neil whose voice was just high pitched enough so they couldn't tell which sex he was. Which meant the pervs would talk to him.
My personal favorite was,
Perv) I have a penis!
Neil) That's nice, so do I.
The perverts generally hung up on Neil.