Take it easy bro... I dun see any issue here...
Pple have bad days, tired days.. They r not paid to serve u special requests. Sure everyone wants good service and favours reciprovated but that's an assumption.
They may be pretty but who knows wat they r paid? And photography is not a passion shared by everybody. Some view unsolicited photographers as pests.
If they oblige one guy, what if more comes (ah peks included) given the mad crowds? They must oblige everyone?
Anyway, given the terrible things that can happen on the Net, how do they know what u will do with their pics?