As if using Facebook wasn't stalker-ish enough, now you can track your friends' exact locations with Find my Facebook Friends. This app is very similar to Apple's Find my Friends app that was released last year alongside iOS 5.
The main difference between Find my Facebook Friends and Apple's app is that, you guessed it, the people you share your location with are from Facebook. Both you and your friend need to have Find My Facebook Friends installed in order for it to work.
If you're concerned about privacy, you can rest knowing that Find my Facebook Friends gives you a lot of options when it comes to sharing your location. You can choose to only share with certain groups you have set up on Facebook or with specific friends. You can also take the opposite approach and choose to share with everyone except the groups and people that you specify. You can similarly set up Find My Facebook Friends to notify you when someone is nearby.
Another difference between Find My Facebook Friends and Apple's Find My Friends is that in this new Facebook version, you can actually watch your friend travel on the map - you have to refresh Apple's app to see an updated location. While
stalking checking Rene's location, I was able to see that he was driving down a road and the dot for his location was moving along the road quickly and smoothly. My biggest complaint was that if I wanted Rene's name to pop up over his bubble, the app would force me to zoom in really close to his location. I could zoom out afterwards, but then it would automatically zoom back in. This was rather annoying.
There seems to be a few complaints of the app crashing or freezing, but that has not been my experience on my iPhone 4S and new iPad. It's actually running pretty good on both devices for me.