Newbie Query about Pingbacks

I searched on the forum for “What is a pingback?” and got this link”

http://codex.wordpress.org/Introduction_to_Blogging#Managing_Comments

Which was somewhat useful, however my question is about whether to “Approve” or disapprove of pingbacks and trackbacks. If you disapprove of them, do they no longer link to my site?

Thanks for your help!