I think the big issue with C&Ds is the location of the cache. Many are in busy lay-bys often down a little cacher’s path behind a tree. Unfortunately that cacher’s path attracts others who use it for a completely different purpose! I have just noticed that Grockle Board has been archived for precisely this reason. At the best you’re grovelling in rubbish at the worse …….!
C&Ds really need to be off the ground and, much as I hate nanos, the little tube pushed into a road sign is a much better solution, provided that the CO is prepared to replace the little log every month or so.