Did you ever insult someone because of the beer they ordered?

I am in a local beer bar every night (that's a bar that sells true beer only- not that fizzy yellow alcoholic water most of you call beer) and the bartenders and regulars always laugh when one of you come in and ask for a Coors Light. Or a Budweiser. Or a Corona. You get the idea. When the bartender tells them "we don't serve that kind of beer here" they usually get frustrated and leave (while we mock them the whole time on their way out). I've been in quite a few scuffles in situations where I am sitting there drinking a great craft beer, someone sits next to me at the bar and orders a Blue Moon. I'll start laughing and make fun of the guy to the bartender. Any of you other beer snobs out there do this? It's quite enjoyable!