Nope, not experienced and don't plan to be. I totally believe it could be a nice experience in a different setting, but I doubt that experiencing it in the hospital or mid-arrest would ever be enjoyable.

Do your friends generally take drugs involuntarily and without informed awareness of the effects and without a trusted trip sitter the first time they do something new and with associated negative circumstances (like a broken bone or an arrest)?

That's GP's point I think: the context of the experience makes all the difference.

Ah, the comment was edited after I replied, oops. Yes.

(Though I don't believe whether it's enjoyable in the right setting has much to do with whether cops should be using it. I get that this is a defense of ketamine as a recreational drug, but e.g. alcohol would probably be un-fun if the first time you experienced it was at a high dose during either surgery or an arrest, and that one's widely accepted as a reasonable recreational drug.)