Academic

So I just got an iPhone4! This is big news, particularly because I've catapulted from a clamshell, old-school phone (yes, all of you who'd send me charmingly conversational text messages only to receive in reply "OK," I was painstakingly pressing buttons repeatedly to come up with each letter of my response).  Here I am, at long last, enjoying the brave new world of the the smartphone.  Longtime readers, I know you are not shocked by my Luddititude.

I've been aware for some time that Apple automatically appends a "Sent from my iPhone" message to the end of emails.  How do we feel about this?  Is it a status symbol?  A sign of slavish devotion to the Big Apple?  A plea to excuse typos, along the lines of the old " dictated but not read" (which a partner I worked with joked meant, "dictated but not thought about")?  A marker of apathy?  Technological naivete? 

 Should I change it?  Is this no big deal? What does it say about me?  Give a late-adopter some guidance, here.