Life is hard, it's over when you give up. I like little nuggets like this, they really say something instead of me trying to convey some technical theory.
I don't believe any system is totally secure. I know that a lock on a door can be picked easily. This doesn't stop me from locking my front door every time I leave. Just because something is hard, just because something is challenging and most importantly when something is impossible. Are you just going to give up and let the rest of your life amount to nothing?
That's fine by me, but don't take others with you when you go. If you'r going to write the application equivalent of a poisoned punch(even if it's only fatal vary rarely and even then only for stupid ppl), do go giving it out at a party... That's not cool!