You Anger Bartenders on the Regular
As the "foodie" scene clutters, a faction of Don Draper-aspirants are going table-to-bar with berating restaurant employees. Requesting crafted cocktails and rare aperitifs they read about on the Internet, these clowns take pride in making people (in this case bartenders) feel inferior.
If you're prefacing drink orders with a story ("I visited a lovely Heuriger in Vienna where I sampled a piquant...") or sweating your bartender about "bitters," you're an asshole. Maybe you know something about booze, maybe you don't, but you sound like a douche. And, worse yet, you're proud of it.