Ordinarily I'd say no, earbuds shouldn't be banned, but in Obama's America anything nannystate-esque is possible.
AHAHAHAHAHAAHAHAHAHAHAHAHA!!
You people don't know you're born, do you?
Come to the UK and find out what a ban-happy Nanny State *really* is.
(or, actually, Australia or Germany as well)
Oh, as for the question - no, we shouldn't ban them. But I certainly wouldn't be stupid enough to be wearing them when out and about - but I'd expect the dangers of doing so, and thus being so unalert to one's surroundings - to be more like getting mugged or hit by traffic than having a plane land on you.