"When will they ever learn..." - Pete Seeger
This is so ludicrous that it wouldn't surprise me if it were an April Fool's joke (and if so, wouldn't it be cool if it were THE BRAND doing the fooling, as opposed to Engadget), but at the same time it doesn't surprise me that it's NOT a joke.
Mashable makes a great point asking whether and/or how T-Mobile thought Engadget would react (as in did you not see this coming?) The answer is they weren't thinking or didn't think (b/c it just wasn't aware of this little thing called social media and specifically, the blog-o-sphere)
On a related note, T-Mobile has also issued a C+D to the makers of Blue's Clues, demanding that Blue's friend Magenta be "permanently erased"...OR ELSE!!!
Hat tip to Len Kendall