Again, this is all personal experience. I've honestly never seen, or noticed, Shirk being used at all in randoms. Apparently thanks to Tanks insane enmity generation it pretty much doesn't work unless you're using it on another tank, or you play in a VERY specific way to minimize your aggro without losing it.

As far as Rescue goes, I've had healers cost me most of Delirium to "save" me from getting tickled by a circle AoE around the boss. I've had a healer blow the Ten Chi Jin on my Ninja by pulling me out of an AoE I was only standing next to, late. I don't make threads about instances like this, or generally bring them up because at the very least they were well intended Rescues, but my life in this game would be better if I could turn that off.

I can't envision Shirk being as persistent a problem due to it's mechanical limitations, but if you feel it is then you should make a thread and make your case.