The thing that strikes me as odd about the letters is that we as low carbers probably track our foods more diligantly than anyone else. We use all kinds of tools and when we come to a stall, we will research our entries, post them for others to review, try 5 or 6 different things to get things moving again, or deal with whatever issue we have. how all of these people in these letters have figured out immediatley, time after time, in each letter in a matter of moments that sucralose was the evil that made them all horribly ill and poisoned them...
I also agree with the statement made earlier that they all sound suspiciously similarly written.