Bevan666 and spam - this reminds me of one particular Private Pilot with his own plane who used to come into a particular CTAF and make his callsign _MS - standing for __________ Munipal Council.
He saved a fortune in landing fees over some period of time, I believe.
I feel sorry for the poor bu99er who really had the _MS callsign though!!! "Gee I can't remember landing at _________"