They really should disallow fat people from fast food places. It should be like the bartender who refuses a drink to someone who is too drunk. They should tell them "I think you've had enough. Want me to call you a taxi? In fact fuck the taxi, get walking, maybe you'll walk some of that fat off you fucking wildebeast."
I'm not prejudiced against anyone by race or sexual orientation, but fat people just disgust me. Their problem is totally down to their own weak fucking will.