Signatures have existed preconfigured on smart phones since the beginning of time. The iPhone did not by any means change the game here. Have you never seen "Se

Signatures have existed preconfigured on smart phones since the beginning of time. The iPhone did not by any means change the game here. Have you never seen "Sent from my Verizon Wireless BlackBerry" before? By default, most users are not savvy enough to realize that the signature is something that can be modified and/or removed completely. In any event, I modify my signature to read: "Message sent from a mobile device, please excuse typos and brevity". This is a completely legitimate practice (although subjective at the same time) in that if I am replying to an e-mail, I want the recipient to know that I am not cutting them off short or am attempting to be rude - particularly if my responses to said individual are typically thorough with details. If I am on a train ride and take the time to write a 2-3 paragraph e-mail on my mobile device, I will simply just backspace the signature and be done with it. I am not attempting to portray a snob when I leave my signature in tact. Quite the contrary -- I simply want to get a message across to someone who took the time to write me an email in a timely fashion without offending them if my response lacks proper email etiquette and length.