Pocket Dialing, how many times have you pocket dialed, or received a pocket dial? Blame it all on the slide to unlock feature.
After my pocket dialing episode ~5 years ago, I switched to pattern unlock on my Andriod phone (NO more packet dials). It's also helped a couple of times retrieving my misplaced phone. Definiitly reduces desiriblity for the finder to keep a lost or misplaced phone.