If you don't care about the capabilities of the Add-On, please stop posting in the thread as you are not contributing.
My contribution is that I don't like helplessness when there are other, better options than screaming for a ban.
The fact remains that killing this addon will have just as much lasting effect as downing a raidboss. Next week, an identical clone will be right back in your face. Crippling useful functions would affect way too many legitimate addons, and still won't necessarily stop it, because the method could simply change:
-A 'Most Wanted' frame could be put on the screen with names of the highest healing-done opponents. It could even turn into a neat little minigame where everyone with that addon competes to see who can rack up the most bounty points!
-Failing that, an addon could just as easily look at combat data, create a list of enemy healers, and give you a handy keybind to target the nearest one automatically.
-Oops, that got knocked out of the game too? Shoot, let's just do a quick armory data parse, see who's got PVP healing gear on or a PVP healing spec, and highlight those names as priority targets.
There are SO MANY WAYS it can be done.
Instead of thinking about how to break someone else's creation, why not overcome it? I still like the idea of a defensive version, with raidmarks and speech bubbles assisting, it has MORE possibilities than the offensive version, and thwarts dangerous opponents even when they aren't using HHtD. Let everyone know who's being the most helpful healer or drawing the most enemy aggro. Put a special nameplate on healer-killers so everyone knows to tear a chunk out of them, and they won't even get out of a graveyard before taking some hits.