While the prevalence/desirability of these abbreviations was being discussed in comments to Can I say "acquire sb sth", the title was amended to spell out the words in full.
I don't have a problem with these abbreviations. I wasn't "familiar" with either before joining ELU, but I'd probably encountered them many times and figured them out without realising that to some people these abbreviations are perfectly commonplace "standards".
Should ELU discourage these usages? And edit them out of questions?
I personally don't think we should, so bearing in mind how question votes work on meta, please upvote this question if you agree [that ELU shouldn't have a policy of discouraging these specific abbreviations], or downvote if you disagree [i.e., if you agree with Mahnax's answer, and you object to them]. (Comments/answers are good too).