Facebook - Be careful when you grant permissions

Always be careful when you use the ALLOW access function within your Facebook account.  This function differs from the LIKE capability and may lead to spam advertising posts on your wall or your friends.

Facebook: be wary of those “requests for permission”
http://sunbeltblog.blogspot.com/2010/12/facebook-be-ware-of-those-requests-for.html

QUOTE: In Facebook, it is important to think about who you give access to. If you give permission to scammers, your account then becomes their spam tool. To illustrate, we followed one of those tiresome posts. Following the link required you to give an account named “world-news” permission to:

-- post messages to your Facebook wall
-- access all Facebook account data
-- log in AS the Facebook account owner.

Had you followed this, here’s what would have appeared on your Facebook wall and on friends’ walls overnight: a post that appeared to be from your account “The earth is a spaceship” with a shortened link.  However the link leads to insurance and other advertisements