This kind of reminds me of what one of my sisters posted on Facebook recently. She and her husband (who are both chubby) were out walking on a hiking trail and a fit woman with a European accent of some sort passed them and they had a brief conversation. During this conversation my sister's husband mentioned that they both had doughnuts before the hike.
This mortified my sister. All the other women (and some men) responding to that post agreed that her husband made a very big faux pas and should be chastised accordingly. I thought it was hilarious, that she'd get upset about being outed as one who eats like crap and is therefore a chubby chubster.
Arguing with idiots is like playing chess with a pigeon. You make valid moves while the pigeon knocks pieces over, poops on the chess board, and declares victory.