Suing the landlord because your rental home is haunted sounds like a very difficult case to prove. Getting out of a lease is not easy and ghosts aren't going to suffice. Maybe if every former tenant ran out of the apartment screaming that might help. Flickering lights, voices, clothes flying from closets, and taps on the shoulder or TV could be better explained as maintenance issues.
Maintenance issues probably wouldn't get them out of the lease, but might get them some sort of credit. I don't see how they could establish constructive eviction either way.
s/ Kurt Koehler
308 1/2 S. State Street Suite 36
Ann Arbor, Michigan 48198