As for me, I just ignore those who expect I'll pay. Or, if they are too importunate, then I can say something to piss off them.
So you can feel I'm involved.
I just think that if a person has no shame and conscience, then nothing will affect him.
But also, I admit that for some people it’s just way of playing – to get A$ for services – some came here just to get and feel such an experience.