[W]e’ve harnessed the mighty forces of technology to bring you a new, life-changing feature. Stalkers have been around since prehistoric times, quietly eyeing their prey, waiting for the opportune moment to strike. Now, unlike the woolly mammoths of yesterday, you can find out who’s watching before they stick something pointy into you! That’s right: with our new Stalker service, we show you who’s viewed your profile.
Of course, nothing is without its caveats. You can opt to browse anonymously, which means that your profile views won’t be recorded. If you do, though, you’ll lose the ability to see who has stalked you. You can modify this setting at any time, on your settings page.
I am compelled to point out that I would not be aware of this feature had there been no entries in the list. (Okay, there was one.)
They also have a service called Dead To Me, in which you place names you never, ever want to hear again. From the site, that is; it doesn’t work in Real Life, and if it did, I’d pay them a whole bunch.