For what it's worth I think your stage banter is rather cheeky. I always get a good chuckle out of your dry, almost satirical, sarcasm. Praise Bob.
Coming on stage in Dallas, Texas, and saying "Greetings from the Mother Country!" was a risky move which didn't necessarily pay off, judging by the boos and hisses which erupted from the audience straight afterwards.
Fuck 'em if they can't take a joke.
Other attempts to be charming have included:
"Make some noise motherfuckers. [*Silence*.] Can anyone understand me? is this mic on? Pff! Pff! Hello??!".
"I hope you're all wearing your magic golden underpants." [In Salt lake City.]
"Welcome to 90 minutes of 'Not Dubstep'!" in Chicago.