Normal people would, but not people who -- day in and day out -- read articles about privacy issues on Facebook.

Once the iPhone app starts invoking a "Facebook would like to use your current location" popup each time you launch, where "no" will prompt you again next time, but "yes" will remove the annoyance, a lot of people will choose the latter.

And then some people will uninstall it.

I believe the proper answer is, 'no chance in hell'. The second I do, I'll start getting bombarded by ads coming to my cell phone. Since my number is listed online, but i don't actually 'own' it.