The jsfiddle linking restriction gives you a popup:
"Links to jsfiddle.net must be accompanied by code."
When I encountered that popup, I found it to be counter-intuitive and to require explanation. However, to find out why the rejection exists, I had to: > try to copy the term from the popup (you can't right click > copy it) > do a google search > find a related meta question > and assimilate the reasoning in the meta question in order to understand the popup's point.
I really think it needs improvement to be very explicit about the desired behavior and why hoops have to be jumped through, which I would re-term as this:
"Links to jsfiddle.net must also be accompanied by code blocks to ensure the basic code logic posted survives along with the answer."
Or a similar explanation of why additional action is required. If language can be found that is clear enough enough, then perhaps the popup will stand on it's own. If not, perhaps a link to a faq entry or the meta thread is in order.