i guess it's just doesn't really bother me that much when I see heavy people lifting. It's all part of it in my opinion. It seems to me like they are trying to get fit, and I respect that. Just because you see them pushing weight doesn't mean that's all they are doing. Anyone who says "just hit the elliptical and burn off fat" is full of shit in my opinion, that's poor training. Losing fat is great, but why not at the very least maintain what muscle you do have? Not only that, but I know when I'm cutting, my lifting can get my heart beating fast as hell, it's a great workout and if I'm getting my heart rate at 140 for the hour I lift, then what's so bad about that?
Next time you see an obese person pushing weight, don't look in disgust, look in admiration because it's probably a hell of a lot harder for them to push that weight then for us. Last thing they need is some 260lb lifter with 8% body fat looking down on them and casting judgement.