There's many factors that can account for such stupidity, such as account buying or just thick-headedness and willful ignorance.
However, it can't be denied that Abyssea is the most prominent factor behind that.
Theres really not any more stupid people running around then before, the only difference is we notice them more often since we tend to pay more attention to someone will all 95 jobs or relics/mythic/empys. Before they just kinda flew under the raidar because there was nothing to really remember them for, a stupid person with good gear leaves more to be remembered/talked about then just a stupid person with average stuff because we expect that anyone with good stuff would be a good player (lol).
Yeah I know. Posted on the last page about, but tl:dr; I'm the duchy's most trusted vassal--I murdered their archduke. I gotta wonder if they know or what. Because the cutscenes are uncomfortable ! <_<
Some probably know and some don't. The blond from CoP (can't remember how to spell her name so not even gunna epic fail it) is the second in command in jeuno and she knows so probably her and anyone loyal to her. Wolfgang is probably clueless though XD