i'm pretty new to geoacaching, so i haven't had a whole lot of problems just yet... but...
the other day, i was browsing what geocaches i wanted to do, and i saw this one that has had a lot of activity, lots of recently found logs. so when i went to do this cache, the container was in a slightly hard to reach area, inside a tree, in a semi wilderness area and to get it, you had to brainstorm ways of reaching it on the fly. well when i finally got to the log and signed it, i noticed the last person who actually signed it was in 2014! i was kind of irked off. it was a little difficult to reach, but nothing picking up a branch wouldn't solve. you didn't have to climb a tree or anything. just use a stick to drag the container towards you, pick it up, sign, toss it back in the hole. a very basic amount of effort to reach it was all that was required.
Also, at the same geocache, on the site it said there was a TB, but there was no TB in the container. So someone picked it up and did not log it. -.-