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The Internet Archive and more than 20 Web companies are banding together to preserve the historical records of the abbreviated Internet addresses that are passed around on services such as Twitter. Companies participating in the archiving project will periodically record the short addresses they generate, along with the original sites they point to. The Internet Archive will store the information privately.
If a provider closes or ends its service, the Internet Archive will give 301Works control of the site so that it can support continued operation of the shortened links. Consumers will also be able to enter shortened links to see the full versions of them, Mr. Boyd adds.
There's little about URL shortening that needs to be preserved for history IMO.
I don't like shortners simply because they hide the destination. I got an sms from my phone company containing a short url. I didn't even open the link because the message could technically have come from anywhere.
In emails there is no size constraints.
also, as i mentioned previously a long url is relatively useless in print advertising.
and completely useless when vocalizing urls, for that matter.
"slash, slash, dot, dot, dash, dash, buh, bye"
Also, it is not really a security problem per se: I take it we are primarily talking about being taken to unpleasant material (with the risk of being accused of being viewing illegal material), rather than your PC being compromised.