Outside of brewpubs, and a handful of bars where they actually know what they're doing, most places don't know nor care about different beer glasses. Even if they have great beer lists, places with proper glasses are more an exception than the rule.
Heck you'll probably find the majority of homebrewers/beer geeks don't pay as much attention to it as you probably do. Heck I have all manner of different glasses, and most of the time I prefer my favorite pint glass or belgian snifter or even my favorite big pilsner glass for all my beers, regardless of what's proper.
Usually the only time I'll bother to use a "proper" glass, is if I'm reviewing a beer...But otherwise, whatever glass I'm in the mood for is the "proper" glass for me.
I would just be happy that BJ's had more than just BMC, then whether or not it's in the correct glass. Hell at least they didn't just bring you a bottle and you had to ask for a glass, like half the places on the planet.
It's just so not worth getting bent out of shape about. We beer geeks sometimes get so silly getting so worked up about inconsequential things....I just count myself lucky if anyplace has decent beers.