Reshurum. this has come up several times on the server, and over the time the server has been running we have tried them. It turns out that these mods can be unreliable, and then give people a false sense of security. By not having these mods, we force people to hide their important chests and not leave them in the open. This avoids alot of anger and negative remarks towards the server, as we dont tell you that your chests will be safe..
Hope you understand, and definitely look into hiding your chests. Remember, if you cover a chest with another block.. anyone who breaks that block to access your chest can be banned for griefing.