To be more specific, I regularly encounter acronyms which are either ambiguous (e.g. is LDA 'Linear Discriminant Analysis' or 'Latent Dirichlet Analysis'?) or rather obscure (either because of a specialized area or just an idiosyncratic use of terminology - and googling is often little help in either case).
Either ambiguity or obscurity can lead to answering a different question than intended, or significant delays in clarifying an answer.
I try to encourage people to spell things out on first use in a question (subsequent use of abbreviations is okay), but it often feels like I'm trying to close the stable door to the sound of hoofbeats fading over the hill.
On the other hand I don't want to stop people using really standard abbreviations, but I find it very hard to draw a line, which makes me lean toward almost always spelling it out.
What do people think? Is it sensible to have that in the help? Is this perhaps too minor an issue?