Here is a useful article that tells you “How to protect your Facebook account from Rogue Applications”
March 21, 2011
A rogue application is a Facebook application developed by someone with fraudulent or deceitful intentions. The application often doesn’t perform its stated objectives. It is designed to obtain account information of the user, and it can be used to spread spam, scams or other malware to the friends of the infected account.
The best way to guard against rogue applications is to avoid any third-party Facebook applications entirely. If this approach is too extreme for you, there are some steps you can take to help protect your account.
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