Facebook users should beware the latest scam doing the rounds on the social network. A so-called opportunity to win free tickets with Southwest Airlines may look like a dream come true, but in fact is an opportunity for scammers to harvest your information. Messages are being spread via comments on other users walls rather than status updates. The offer of free tickets may have proven too attractive a lure, and so you might agree to proceed whereupon you are greeted with the all-too-familiar sight of a Facebook dialog asking for your permission to install a third-party application.”]
Source: https://nakedsecurity.sophos.com/2011/02/22/free-tickets-on-southwest-airlines-latest-facebook-scam/