I have been surprised to see several negative logs posted by caches on earthcache sites that have been closed down becuase they didn't meet the earthcache guidleines for education. Frankly, if there was no requirement for "finding" an earthcache they might as well be called virtual caches as all you have to do is say you were there and answer an easy question.
I find that I am in disagreement with those who criticize the Earth Cache educational guidelines. These guidelines don't prevent visits to the area nor do they discourage enjoing the area.
However, to log an official visit as an earthcache one must learn something about the area. Kudos to the rulemakers. I believe that in order to assist in the protection of these natural resources we need to be better educated.
ALL caches contain a "challenge" of sorts before one has the right to "claim" the cache as found. Traditional caches require that we find the cache via coordinates. Puzzle caches require that we solve a puzzle. Virtuals require that we answer a question to prove our find. So, what is wrong with learning something as a prequisite to claiming an earthcache find?