Foursquare rolled out a minor new feature today that lets your Facebook or Twitter friends "like" your Foursquare check-ins even if they're not connected as your friend on Foursquare. For now on, when you share your Foursquare check-ins with friends on Twitter or Facebook who are also on Foursquare, they'll be able to like it, regardless of friend status on Foursquare.
Foursquare will even send you a notification whenever someone outside of your Foursquare friend zone likes one of your check-ins. However, these can easily be turned off in the settings if you don't want your email to get bombarded with pesky notifications -- we can't blame you for not wanting to "know how awesome you are" (Foursquare's words).
Of course, this dips just ever so slightly into privacy concerns, and the fact that non-friends on Foursquare are able to like your check-ins and statuses, but we're guessing that since these are people who are your friends on Facebook and Twitter, most users won't really have a problem with it.