Healers who rescue pull tanks into mobs.

[Manamaru]

Rescue is definitely a strange ability.
You can't use it on someone that's actively AFK'ing
It's usefull on people who are about to get nuked on AOE, or those that refuse to go to the spot to not get nuked by ancient flare.

I'm a casual player that doesn't want to go all hardcore elitist about things. But the accounts of those that either use Rescue to pull into mobs or trolling? I see it akin to a similar issue of someone PKing by kiting mobs (like one account I read about Eureka).

If they're especially a rando player who's trolling like that for rescue, you've got a few options.
1: Tell them to stop. Bad healer! BAD!
2: vote kick if repeated
or 3: report them so any GM can discipline them about their actions. Report function's there on purpose for those that think and behave like they can troll others and potentially sabotage people's play experience.

And save the rescue "fun" for your friends where you and the other are in on it. It should be common sense.

And others could work on setting up their hotbars where rescue isn't somewhere awkward and inconvenient, or just take it out of your hotbar entirely if you never plan on using it, ever. The others, like myself, that do use it on occasion will still use it. Like when someone's not getting on the floating air vacuum of syrcus tower or not Boosting into Birds and is going to eat all the damage.

I should also add that since for the moment 5.25 that we are still not able to place markers mid combat, it's not like you can just plop down a marker for people to tell them to go someplace while a fight's going on.