I dunno.. if you made your intentions about weight-loss known and then you talk about brownies, I'd consider someone who brought up the conflict of interest here to be a real friend to me.
The only thing I disliked about the person's messages was the frequent use of the word "lol"... if she were a bit more serious about it, I'd take it a bit more seriously and less like an insult, but ultimately I can see how reading that sort of thing would be disheartening and maybe even somewhat painful.
Bottom line: If you don't want commentary on this sort of thing, I think you have to keep it to yourself, because it's human nature for people to chime in and put two-and-two together.
At least it shows people remember what you say?
