That said I would not just walk around like an asshat with them in all the time or anything.
Talking to yourself with a non obvious headset will always be awkward looking though.
I think my personal beef with them is when I interact with someone wearing an earpiece, it makes me think (rightly or wrongly) that they are happy to interact with me BUT at any moment a ping from their earpiece will be by default more important.
Maybe it's (perhaps in part) my own issue though.
On the other hand I can see the value in it, especially if Siri's abilities improve, and if speech recognition improves also.
Maybe I'm just old fashioned and in time this will built into our social fabric (I think back to the late 1980s and early 1990s when walking around with a handheld cell phone seemed incredibly dickish)
And that's maybe not wholly something I understand anyway, but sort of feel bad about regardless. I mean, I do wear one [1] during my commute so I can listen to podcasts without wires all over the place, and I'm really hoping iOS 10's speech recognition via crappy mics is good enough that I can integrate voice control into my exocortex. Does that suffice to make me an asshole? Or does it require that I use it to have loud conversations about business things? Or what? I'm not all that sure I grasp the nuance here.
[1] https://www.amazon.com/Firegram-Mini-ear-Bluetooth-Headset/d... - it's about the size of the first joint of your thumb.