*The only one of such messages that I will exempt from the forthcoming diatribe belongs to the Zeph, because his, "if this message looks like I typed with my elbows..." is at least humorous.
Now I get that typing on a tiny little touch screen is more difficult and perhaps makes one more prone to typing errors (though with the autocomplete feature, such an assertion is debatable--more likely than spelling errors are autocompleting an unintended word errors). That's fine.
But does reading from a little screen prevent you from reading what you wrote? I mean you just read the message you're responding to and seemed to not have any problems. So why can't you read what you wrote to make sure you spelled everything right. Don't you do that anyway? And especially don't you read what you wrote if you're sending a "reply all" to something like 2,000 employees* of a major corporation?
*Another topic from which I'll spare you my rare but fun rants is the tendency at my current employer to send "reply all" messages to release announcements redundantly reiterating the congratulatory message of the original. It seems that there is a direct correlation between one's perceived relative importance and one's propensity to send such a response. But I'm guessing that nobody is keeping track of whether all the VPs and the most self-important of the directors have sent such a response. OK, I guess I didn't spare you the rant and you got a tangential rant instead. Moving on.
I think I'm going to make a new footer that says "Please excuse any typos. Though I may or may not have sent this from my mobile device, I was too lazy to proofread my massage."