I really think that cell phones are one of the main reasons some students don't do well in school. I was way too nice this year in dealing with texting in class. As a first year teacher I was a bit anxious dealing with this problem.
My plan for year two is to start out very strict. I will keep this image that I manipulated in Photoshop in mind every time I even see a cell phone. I need a bit of Darth Vader in me. :-) (think Captain Morgan ads)