Since you included such important details in your amazing post including where the plastic you peeled off even was ... i'm going to assume you just pulled the plastic off the back of the sliding screen. The piece of plastic was actually tied into the electronics of the phone. It was designed as a theft deterrent. Now that you have pulled it off your phone recognizes the phone as stolen and exactly 72 hours from when it was removed the phone will lock down and only a motorola tech can unlock it again. It also is considered tampering and you will not be eligible for a warranty replacement. Hope you have insurance. I would immediately begin hand writing all your contact's names and #'s down on a piece of paper, you will probably loose those too
If you believed me your a sucker ....... next time do a search. Took me 3 seconds to get it
http://androidforums.com/droid-how-tips/19202-dont-forget-remove-plastic-film-back-screen.html