I think a lot of times people don't actually think about the hint they have been given. Although i have been caching a few years im still new at this and as a new cache hider I gave a hint of "think outside the box....errr tube?"
the cache is located in the only open tube along the path, not a small tube mind you but a 3 ft diameter opening tube. the third or 4th person to log the cache ranted about how nothing made sense in the hint or description.
I guess you cant please everyone, but i do understand why people don't put clues of any sort now.