Hacking 101
If you're having a bad day take 10 minutes to be entertained by watching RockyH's video "Assembly Hijacking".
In it he demonstrates how to hack a web site whose search page is open to SQL Injection attacks.
If nothing else, it's a good way to get your point across to junior programmers after finding non-validated user input during a code review.
Alternatively, public humiliation by pulling their pants down in the lunch room works well too.
via Steve Smith