The
"Sent from my iPad" thing is the default signature in the iOS mail 
 Actually, I think I did know that.
  client.  Most people don't know enough to
change it, even though it
 takes like 20 seconds.  In fact, I'd wager most people don't even know
 they're sending it. 
 I would hope people here were clueful enough to set their signature
 correctly.  If I ever write a mail client (which is unlikely), I am liable
 to make the default signature soemthing like 'I am too clueless to read
 the fine manaul and configure this mail program' :-)
 -tony
  
 
I've alway liked "Sent from my Banana PC Jr. 6000."
--Ernest