On the plus side if you do manage to see one of these bases they are normally very easy to raid if you know of the exploit as well and are often full of gear, plus you get the satisfaction of knowing you have stopped some guy abusing a pretty game breaking exploit.
On the downside people can also shoot out of the rocks they are in and you cant shoot in, really needs to be fixed.
But.. if someone went into that rock.. Didn't that person abuse it to :o
(even if it's to get their gear)
Stay out of da' rocks ! Tell the admin(s)!