Umpteen acronyms for corporations have passed into everyday language for example BBC, who refers to it as British Broadcasting Corporation, smacks of a bygone era. Others such as FBI, CBI, CIA, EU appear to be the most common way of referring to corporations and institutions, so much so, there will be those who won't be aware of what the full title is. I take your point Elegran though. I think it is not uncommon for new subscribers to remain baffled by some of the acronyms used on this site if they don't stumble upon the glossary, but then again they only have to ask and many will jump in to explain what they stand for.
I do use acronyms such as MN, GN, M&S, who doesn't? just not the personal ones, but as you say each to their own.
On a personal note, I once loved Patricia Cornwall's crime books until the acronyms took over 
My personal dislike is LOL, if used to denote what precedes it, is supposed to be funny, I can't really explain why I don't like that one, I just do, I'd rather use the smile emoji 