"May I ignore you?"

"May I pretend to go and get something then disappear?"

"May I give you irritating answers to every question?"

"May I stand and smile at you with a glazed expression in my one good eye and then give you something that you never asked for?"

..... or the really honest ones .....

"We get paid regardless of whether you buy something or not"

"Honestly, I couldn't care less"

"I haven't been paid for six months - do you really want me to serve you?"

"I have a boyfriend in CID who can get me an NOC so I couldn't give a toss if I get fired from this crappy job"

.... any more?