I just got my first 2010 issue of This Old House and came across an article about lock bumping. This sounds familiar; I'm sure I've seen a news report on this, or maybe it was one of those warnings circulated via email. Turns out, all those break-ins with no sign of forced entry are likely a result of lock bumping. It's when the theif inserts a modified key and taps it with a hammer and voila! Scary. So, I went looking for a little insight and possibly a remedy thinking there's got to be an easy fix and I learned all about bump-resistant deadbolts. Better to be safe than sorry.