That just means we didn't grow up in the same learning environment. If you threw common sense out the window (and jumped after it), then maybe I'd think otherwise. Acronyms aren't all necessarily common knowledge. For example, I'm a little more than a little OK. Pretty much clueless when it comes to texting acronyms. Does that make me an idiot? No. It just means that I a) don't use them and b) have never had to.
On a slightly more related note. . . Idiotic is when you out yourself during N1 for no reason or commit suicide in mafia (unless you're curr3nt. Then we're getting into the insanity and psychological havoc zone)