Here's a DNF question....
What about challenge caches? It seems to me if you attempted a challenge cache like the Delorme Challenge while on vacation in Utah, and you failed and may never come back or it may be a long time, that a DNF should be posted. I think I would. I can see the point some may make that they had not yet looked for the final, but at the same time I think it gives you a record of the attempt for yourself plus it lets the cache owner know people are attempting the cache.
I understand, if you live in Maine and are working on the Maine Delorme Challenge, that it would be silly to log a DNF every day until you logged it. But there are times when you know it will be a while before you can come back or conditions for the challenge exist which would require you to start over.
129 logged DNFs and counting!
Our experience seems to be that our rate off DNFs does not decline with experience. In fact we are more likely to log a DNF now because as owner's of quite a few hides, we know how helpful it is to let the cache owner know there might be a problem.
Nothing more frustrating than to be told by someone they have looked multiple times, when if they had simply logged the DNF you could have clarified the matter and spared them, and others, fruitless searches.