Two Stories:

Back when Treasures of Aht Urhgan opened up for FFXI players I ran all about on the first day to explore explore explore.

Me and my buddy entered Aydeewa Subterrane and I bet ya we were the fist ones there after doing a see all. I saw for the first time a Qiqirn and wanted to know if it was aggressive, passive, whatnot. To my surprise the rat guy could be icon'ed like a player character. I tried everything to interact with it but nothing happened. Even tried talking to it. Was the strangest thing to happen to me in that expansion. My buddy was even confused by it.

Np idea if it was a glitch and GM in disguise but it got my imagination running on GM controlled characters.

Second: First months in FFXI my party was MPK'd by someone scorned by an online lover we had in the PT.

Goblins were herded to our party, the mage warped out, we all ran and tried to survive…. then we got the threatening /tells to disband or else.

Granted the guy who was doing that really had issues, but it got me thinking that if this was a scripted event, it would have been really fun.

So to the OP… GREAT IDEA