You're definitely a troll.
I even start doubting you use Rescue to "save sprouts"... but to actually harrass people, hence your hostility when I am pointing out those behaviours.
Just put in the safety net for the rescue. Once cast on someone, a window pop up: 「Do you wish to be rescued? (Yes) (No)」 then another window pop up after choosing either (yes) or (no) 「Are you absolutely certain? (Yes) (No)」
Would be fun...
I used it to save a lot of people in a multitude of situations, between pulling people onto the tile for Phelgaton, pulling people out of the Tsunami in Famfrit, it has its uses. I have also been rescued poorly, but I knew the intent behind it sometimes (I was going to Aetherial Manipulation to the party for a stack, but they rescued me in the middle of my cast, I understood why they did it, it was just poorly timed)
People are always gonna grief (I'm no saint here, I did jump from Titan and pull my friend down for laffs near the end) but at the end of the day, legit skill with a good purpose.
Why I didn't bother to even do it is because I am pretty sure they will get away without anything, so I'll just waste my time.
Give a tool to trolls to harass people, but at the same time it isn't much of an offense so that even if trolls use it, they won't risk much... or nothing at all (most probably this).
The biggest problem is that unlike shirk or the aggro system, here, you can force a player movement, and important part, against his will.
Well why not ?
If you guys find it so useful, then you should have the option to make it effective on you or not (like a invisible debuff or a checkbox in the options ?).
You play with your friend, you "turn it on" and let it have its effect on you.
You play in a pug, you have the possibility to "turn it off", to "decline" Rescues.
As I said earlier, it's OK if you're messing around with a friend. But would you do it to strangers ?