I'd be all for a toggle for yourself to allow rescue to work on you or not, that way if ur doing casual stuff and don't want to be trolled u have the option where people doing hardcore content have the option to use it legitimately. I haven't encountered someone using rescue to troll me or someone else but I can very clearly see how someone can be trolled with it. I think I even remember a MrHappy video with the healers playing a game to see who could pull happy into the most instakill mechanics with rescue.