Here is an interesting read on a new line of defence:

"Hacker baiting solutions are set to discourage even the most sophisticated attacker by feeding him a raft of false information and painting completely false pictures of target computer systems."

"Early evidence is that hacker baiting could soon be seen as the first line of defence in a security infrastructure for companies of all sizes."

"If these systems are installed accordingly to the standard policy, they look like everything else on the network. So fingerprinting based on emulation is impossible since nothing is emulated."