Well, I think for those of us that are larger, this whole conversation straddles an awkward line. Yes, it is our own fault that we are the sizes that we are (barring some medical or medicinal reason, of course, there are some drugs that make you gain weight like crazy). We have little room to gripe that it's not fair or what not. We've done it to ourselves.
Having said that, however, clearly it is possible for these companies to accommodate larger people to a degree. Obviously the more intense the ride, the harder this gets. But this country's, and the world's, rapidly growing waist line isn't going away any time soon, as much as we'd all like to see that happen. You'd think on a ride like FJ, where there aren't any inverted loops or long drops like a roller coaster, they would have thought about that in the first place.