I’m going to say it. And be jumped on by people braying that they disagree, without having the courage of their convictions, but No. No it isn’t OK.
If this was a physical setting, where you have to loose an arrow and hit me, or have to poison me, or have to stab me, then that, that is fine. That relies on skill. Getting an emote of “I Just shot you from a rooftop” or “The Food you ate is poisoned” or “As I passed you I stabbed you with a poisoned dagger” Is all trash tier stuff.
Do people know what an assassin is? how they work? They are not Ezio Auditore or whatever iteration that stupid franchise is going through. There was an assassin that started a war once, quite a famous one, thousands upon thousands died. Just because he threw a grenade into a car. He couldn’t do ninjamatics, blackflip and escape harm, he was a student. I’m fairly confident that in a fight, I could have knocked him out with one punch. Or what about the most famous assassin of all time, Carlos the Jackal. Swift swipe to his face to take the glasses off, and then just smack him around. He’s nothing without his glasses and sniper rifle…
An Assassin, is -not- an expert in hand to hand combat. If it comes to hand to hand, they have already failed as an Assassin.
I’ve seen this kind of RP go South very, very quickly, which is why it does not endure. You can present yourself as an Assassin, and Noble House of Stormwind X goes “Can you assassinate Noble House of Stormwind Y?” To which your instant answer, has to be"Err, not -really-" “But Why not?” “Errr, they’re not online so I can’t ask if they are cool with that, oh, wait, they popped online, they’re not cool with being emote killed, so no, I can’t”
If you limit your targets to NPC’s or people who have expressly said they are open to the idea, then groovy, otherwise, its a douche move and not likely to get traction.