In a recent question a link to a site was included that had been shortened using tiny.cc.
The link was inoffensive, however you could not know that for certain without clicking through.
So I'm wondering if we should adopt the policy of discouraging such indirect links. After all, there is no need for url shortening services here as even the longest possible url can be presented as this.
If we allow these URLs, it is only a matter of time until someone abuses them to post inappropriate content.