In my experience, the vast majority of the people I encounter who gloat about rescue and using it to save 'stupid' people are bad at the game, and shouldn't be allowed anywhere near that ability.

I can't even count the amount of times I've been rescue'd into a deadly aoe or had my rotation ruined for no reason while playing BLM by some healer that is already struggling to even keep their GCD rolling, let alone do mechanics for other people.

There are exceptions, but they are so few that I think putting a toggle on the ability would be great.