Earth is doomed.

[DragonMasterX]

Okay then. If the parents are as retarded as you say, then use Inverse Psychology on them.

Or simply, let's say you told them again they are pissing you off, then they'd again reply something about them being little angels. Well, tell them that you need to be concentrated, they are making angelical ruckus that doesn't let you finish with your activities and then clearly state that your studies are above their children's needs.

There's no need in cutting their heads off, yet.