dead letter

a dead letter is a letter that has never been delivered because the person to whom it was written cannot be found, and it also cannot be returned to the person who wrote it
if u send a letter and the person dont get it and u dont get it back
in a blog or other community forum, the action of writing or posting comments which serve to create a fuss or controversy, but do not help resolve the issue being discussed. when you “deadletter” a public discussion sp-ce, you kill the opportunity for effective discourse on relevant subjects and kill the possibility of progress on those issues by diverting attention and energy to tangential or non-sequiteur issues, esp. using incendiary, p-ssive-aggressive, or thinly-veiled remarks aimed at personal or public/political targets.
“that guy totatally deadlettered the issue at hand.” (or) “please ignore that deadletter post about the upcoming event; the important issues we need to cover before the event are really these…”
a letter that has died.
e – “did you hear that r has p-ssed away?”

jonny woss – “weawy? i didn’t like him much anyway.”

hence the dead letter.