Never experienced anything other than treatment I'd expect from any other passenger, elite or otherwise when flying. The way it should be.

I did once stagger off a bus (from a remote stand at LHR T4) carrying a can of Newcastle Brown Ale, a bag of crisps, boarding card and carry-on and get directed to the back of Y when I should have been sent upstairs to 62K. Presumed it was because although dressed in smart casual (as I always do) I was presumed to be ruffian scum