Já fakt nechápu, o čem se tu dohadujete . Pravidla pro logování keší zde:
http://www.geocachin...guidelines.aspx
(III.), bod 2 - logování nefyzických keší, oddíl 1) earthkeše:
Logging of Non-Physical Geocaches
EarthCache Logging Guidelines
EarthCaches are designed to be educational, so visitors will be asked to log an aspect of their visit that demonstrates they have learned something at the site. Unlike physical caches, where "additional logging requirements" are optional, an EarthCache requires geocachers to comply with all instructions in order to log the cache online. See EarthCache.org for more comprehensive EarthCache logging guidelines, including that photographic logs must be optional for all EarthCaches.
Tedy, kdo by snad anglicky nerozuměl, fotografické logy musí být pro všechny earthkeše dobrovolné.