Try not to let the one above confuse you.
That's there because it's in the template.
But you can add this to your post like this. and if you tell your members to add their post link to the code then they can use it in their post
- Code:
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<iframe src="http://www.facebook.com/plugins/like.php?href=POST THREAD LINK HERE%2F&send=true&layout=standard&width=450&show_faces=true&action=like&colorscheme=light&font&height=80" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:450px; height:80px;" allowTransparency="true"></iframe>