I might be more conscious about that cost and decide to not eat any than if that cost were figured in and distributed among all users buffet-style.
You assume that these companies would operate on objective and reasonable standards - that's so cute...
No, really, it is. Remember when everyone said that butter was bad for you and you had to eat margarine instead? Now it's the other way 'round (or looking to go that way). So - how would you feel about having to pay for all those times you bought real butter all those years?
Oh, even better - let's talk diets! Not like recommendations for those don't ever change from, say, the old four food groups to pyramid to tetrahedron, to... - oh, wait.
No thanks - I prefer to not put my eating habits and health in the hands of some corporate asshats.
Mind you, I'm 6' tall and weigh 170 lbs, and I play outdoors for fun. I also eat good food in moderation, but occasionally I love a big steak or a big ol' bowl of ice cream. This brings up another thing - no two people are alike. Some can wolf down a metric ton of crap food (I used to) with no ill effects, but you want them to be lumped in with a bunch of folks who gain 15 lbs just from the mere scent of caramel candy? Screw that.