These chests should be public because they're the staff mailboxes.
Hall of fame needs updating
On a related sidenote, I really don't like the barrier blocks and worldguard regions in lobby. Lag pillaring was harmless fun, just for exploring the Lobby from unusual angles (and when it wasn't harmless fun, I made sure to report it as it should be done). I feel that the slight reward of an unusual or interesting scene from, say, atop the grandmaster sanctum, is well worth the time investment and frustration that lag pillaring requires, and seriously considered it as a viable passtime almost as fun as lava survival itself.