Makes me think how adding link shorteners really compounds the problem. Do these services check if there is a bit.ly version of the URL on all of the social si

Makes me think how adding link shorteners really compounds the problem. Do these services check if there is a bit.ly version of the URL on all of the social sites? What about multiply-shortened URLs? (presumably that would be a waste, but in the "ideal" solution we could somehow find them all...)