As well as concerns about littering and bomb threats, some geocachers hide their caches in inappropriate locations, such as electrical boxes, that may encourage risky behaviour, especially amongst children. Hides in these areas are discouraged, and cache listing websites enforce guidelines that disallow certain types of placements. However, as cache reviewers typically cannot see exactly where and how every particular cache is hidden, problematic hides can slip through. Ultimately it is also up to cache finders to use discretion when attempting to search for a cache, and report any problems.