the best thing you can do to sucure your computer is dont piss anyone off
While that may be, I would argue that a good way to learn to secure your box is to do everything you can to piss someone off, especially if they have better skills than you....

Besides, life gets a little boring if you don't piss people off from time to time.

EDIT: My apologies for bringing up a somewhat old thread...it cracked me up for some reason, probably because I am old enough that I don't remember the last time I was worried about pissing someone off...