No, I'd not use them.
Sure, fun gimmick for those who might.
Not sure if I've ever said it in other posts.
I hate how non-private we as a society now are.
I stay away from 'social' sites as much as possible.
Yes, some forums, but, very few, and none that use advertising to support them.
No FB,Twitter,.... whatever.
Google is already evil in its own right on how I'm tracked.
They even want to track me as a ghost. (See quick blurb -
http://www.engadget.com/2012/03/29/google-patent-application-google-plus-ghost-profile/ )
I've disabled all that I can on my android based phone, and only use some of its location features when I need them.
I've never shared my location on purpose.
You might think working in IT would make me more open to technology such as this.
If anything, my involvement in certain aspects of IT have scared the
out of me, so I purposely avoid the public side of it.
* JamminR puts back on his tin hat