Weird things, bad things can happen and so one of the lessons too that will be repeated throughout the course is to actually rigorously error check and make sure that you're always thinking about your user being a bad guy.
In 1994, Mr. Page pleaded guilty after kicking holes in the wall of a bar in El Paso, Texas, and in 1997 he wrote abadcheck in North Carolina, according to law-enforcement officials there.
Not that a little self-criticism is all bad: It can be a reality check and may fire us up to perform better (which can make us more successful) or strive to be better people (which makes us happier).