As much as i'd love to give everyone a chance joining the server, I can't allow mineshafter to be used on the server for 3 main reasons.
1.) It poses as a security risk and leaves the server open to hacked clients/cheaters. This has happened in the past which is why we can't allow it anymore since 1.5.2. I don't want to see the server shutdown again over some retard that wants to use such crap just because its fun crashing servers.
2.) If I allowed it, Loctav would definitely shut/delete this thread down for good.
3.) Technically, its illegal to use cracked clients in general. Even if it hasn't been an issue before, I don't want it to become one in the future.