@roger,
roger wrote:
I tend to be very serious on the language threads. Since I don't have an answer, I'll just stay away.
Hello, Roger, I think the same way. By giving nonsensical answer/s, the posters are confusing the learners and wasting the time of natives who volunteer their help selflessly. For example, in your case, you had to ask the poster the meaning of the abbreviation.
In fact, I respect natives who offer help sincerely and correctly. And I hate some of the jokers on this forum.