I've never been in such a situation, but I know I wouldn't like it. I think someone's weight is a personal thing and I don't like people asking how much I weigh or commenting on how I look/what they think I weigh, etc. It makes me feel very uncomfortable and I find it offensive. I have trouble maintaining a "healthy" weight and I often lose weight when I'm sick/stressed/busy. It irritates me how some people think it is okay to suggest I'm anorexic/lost too much weight/too thin/look sickly/etc but if I were to suggest they looked like they could lose a few pounds...wow now that would be rude!