Alternatively, to what koshimizu said, if people want to leave the "http:" in completely, then a good idea would be to leave it as text on the post instead of making an active link. People can copy/paste those in their URL bar.
...Though I can already imagine people going "you didn't make an active link out of it"... :/
(no subject)
...Though I can already imagine people going "you didn't make an active link out of it"... :/