when the writer could just spell out the words? It seems to me, the point of being on an Internet forum is to communicate with other people and saying what you mean clearly enhances that communication. I think it is insulting to readers to speak in acronyms, expecting them to either know what it means or go look it up. Sometimes it comes across as exclusive and even condescending, implying that "everyone knows what that means" when obviously they don't.

There are some acronyms that are pretty universal and using them is understandable, but others are so obscure, I often wonder if people just make them up as they go.