http://bleacherreport.com/articles/1...e-tag-holdouts
Not the most recent of lists, but 30 seconds on the Google machines and there is a list of other prominent players that did the exact same thing that Bell is doing.
It isn't even a case of not getting screwed over. Bell has nothing to gain by coming in. He gets paid the same. Staying out allows him to not get injured (the absolute worst case scenario for him) and let's the team see if the rest of the RBs on the roster are enough of a downgrade from Bell to get another contract offer (total roll of the dice on Bell's part - what if someone is better?).
The team has every incentive to get him into camp. Continuity, learn the offense, etc. They know what they need to do to make that happen. If they don't feel it makes sense (and honestly with Bell's demands at this point, why would they?) then there will be no movement on the issue aside from some sniping in the media for 3 months or whatever it is until Week 1.
Interesting thought is that a quick tour through the interwebs only has Steeler focused sights that encourage Bell to come in. Most of the non-team focused sites simply state that why would Bell come in until the team changes its offer?