Eh, that Ihatestacy site is a script designed for cheap viral advertising for a porn site. There are rumours it contains malware too, but I'm not sure on that one.
If you kept clicking and clicking, I've heard it does, I've tried getting microsoft points for xbox once using that technique and all that did was kill my computer with viruses. Oh well, that was the end of that piece of junk.
also it's just pointless spams so make sure you fill the details with another email address.
Yet I shall call this the best way to silently kill my computer.