I was just browsing the newest questions and looked a bit a a World of Warcraft question. I noticed it was full of abbreviations (bk, pj, BoA, BGs, ...) I did not recognize. I don't play the game so it does not matter if I don't understand it, but I guess that newer players would have the same problem.
So I'm wondering whether that abbreviation usage is perfectly acceptable, as most (nearly all?) people playing the game will understand it anyway. Or should we encourage people to explain/write in full those abbreviations that may not be universally known.