I try to not use abbreviations unless I have already used the full words, even the oh-so-common LNAB (a newbie isn't going to know that that means Last Name At Birth unless they've encountered it somewhere), but I may occasionally slip, for which I apologise. (MP would be something I might use, meaning Member of Parliament (it's not just the UK that uses that).)
I spell out the full words for places on profiles, as well, for the same reason. Not everyone looking at a profile will know Qld means Queensland, Australia. If the place name is written as SA, does it mean South Australia, or South Africa?
WA in a g2g question -- does it mean Washington state, USA, or Western Australia? (It's related to the non-use of the word "county" in US placenames. Just because you understand "x" means county, doesn't mean the rest of us do.)
I know this type of thing has been brought up before, but it definitely bears repeating, so thank you for bringing the matter to the community.
(I often avoid g2g threads where all I see on the index is a bunch of abbreviations, because I don't have the energy to decipher what is meant.)