Sim locking is purposely breaking the normal functionality of a device in order to limit competition.
I wouldn't care so much if there were plenty of other affordable ways to get a phone and coverage, but sim locking is so prevalent in the US that it's unavoidable in many cases, and most phones you can get unlocked are incredibly expensive.
Make sure you .stop() those fadein hover menus on the plus sign (+) buttons. If you hover over them multiple times quickly then they bounce back and forth fading in/out. Try something like this: http://justinmccandless.com/blog/Correctly+Fading+in%2Fout+o...
I wouldn't care so much if there were plenty of other affordable ways to get a phone and coverage, but sim locking is so prevalent in the US that it's unavoidable in many cases, and most phones you can get unlocked are incredibly expensive.