No it doesn't automatically check you in. You have to click on 'places' on your fb app, or whatever on your phone to actually get it to load and then you can check in. I agree the tagging thing shouldn't be automatically enabled as I can see how that would be a privacy issue because then your friends can check you in, and it would show up on their page to all of their friends. But other than that its the same concept as foursquare and I dont have a problem with that.