This happens to me all the time:
I read my RSS news, view some article and turn my device to landscape mode. When I am manipulating (turning) the device I accidentally press some of the buttons. This became to be very annoying as I am always pressing the search button or the camera button.

Also when I pass my phone to anybody, the very first thing EVERYONE does is pressing the search button accidentally and passing me phone back with words "I didn't do anything!".

Can I disable hardware buttons somehow?