PHP is like a handgun. On its own, it is simply an inanimate tool that has no moral leaning. In the hands of a responsible citizen, it can be used to the benefit of society. But in the hands of someone who is untrained or mentally unstable, it can be used to commit horrible atrocities.
Whenever there's such a tragedy, other developers are quick to blame PHP. If PHP were illegal, then Yahoo! would never have happened. If we regulated PHP tightly, then there would be no Digg.