A while back, he had a run in with airport security about his equipment: http://www.nytimes.com/2002/03/14/technology/circuits/14MANN...
While I don't deny that the security guards could have acted more respectfully, it seems like Steve went out of his way to put himself in a situation that he knew would be problematic. Why couldn't he have removed the equipment before returning to the airport? Also, some of his claims seemed exaggerated, like that his equipment couldn't be x-rayed or that he became disoriented in the airport with having his wearable computer.
If he's looking to make a point about cyborg rights, fair enough, but my opinion of him is that he doesn't come into these situations with an attitude that avoids misunderstandings. I think that another person in this same situation would have at least been able to communicate with the McDonald's staff and determine what the problem was.