Since you asked, speaking for myself, the "Wiifit hurt their feelings" thing? That bothered me. Unless they actually said that. If they don't want to use a Wiifit it's their business.

Also actually you do have to respect their bodily autonomy. That's not in and of itself a bad thing.

Also speaking for myself, I don't think it's evil and wrong to be concerned for your friends and their health choices. But the way you phrased it, yeah, not working with me.