Okay, I get it. It's a heck of a lot easier to say, "ACRL," than it is to say, "Association of College and Research Libraries," but come on people. Using acronyms is one thing, but the presumption that everyone knows what your acronyms mean is quite another. The rule is, and has been as long as I can remember, that you spell out the thing, whatever that thing is, the first time you name it, and then you use the acronym or abbreviation. Why do so many people disregard this convention? And yes, I mean you, person who sent that solicitation out to a listserv looking for new people for that thing your roundtable does. I also mean you, person who tweeted something similar. And I most certainly mean you, webmaster for that regional organization where I had to dig and dig to figure out where the heck you all are located. Before you complain that you don't know what to do when you only have a limited amount of space, I've got the answer: link to something with an explanation of the acronym.
Please, my beloved librarian brothers and sisters, take this to heart. Following my advice will certainly endear you to me, but ignoring me will do more than make me dislike you. It might make me avoid anything sponsored by your organizations, but at the very least, I won't join you because I'll have no idea what you do.
And, on that note, ttfn.