Why would you expect anyone one sharing a lease to be obliged to share their personal knowledge with anyone else?
On the same token, why would you feel so inclined to share your personally acquired info with anyone else just because you share the lease with them?
A lease is much like a business. There are some inner circles that you inter act with differently than others for what ever reasons. You just have to learn which ones can be used to your advantage and which ones not to confide in.
