I'm afraid that if a plugin doesn't exist to allow users to delete their own accounts, it would probably be rather difficult to code it in. Furthermore, abuse of such a function is an important factor.
Re your attack on BoS ideals - well, I personally don't mind. Every subject's avatar in the HSC, except maths, is but a ghastly, pathetic shadow of it's true self. These joke subjects cannot measure true potential, and as such it is useless to say "I did it all by my self, so should you.". If this were university, you would find me agreeing with you entirely and whole-heartedly.
Oh, and why did I exclude mathematics? Because it is extremely hard to butcher and bastardise mathematics as has been done with the sciences and the humanities. Some may say it is being done, what with the over-abundance of calculus and the heavy emphasis on memorisation of formulae, instead of deductive reasion, self-exploroation, imagination and proof (although this really only applies to the 2unit and general courses). But overall, maths is left untouched. And furthermore, you can't cheat maths. That's part of a much greaty beauty of maths - any effort you put in, no matter the source, is genuine.