Hot damn, this is a great idea! Reminds me fondly of an old project a friend and I built that looks like an SSH prompt or optionally an unauthed telnet listener, which looks and feels enough like a real shell that we would capture some pretty fascinating sessions of people trying to explore our system or load us with malware. Eventually somebody figured it out and then DDoSed the hell out of our stuff and would not stop hassling us. It was a good reminder that yanking people's chains sometimes really pisses them off and can attract attention and grudges that you really don't want. My friend ended up retiring his domain because he got tired of dealing with the special attention. It did allow us to capture some pretty fascinating data though that actually improved our security while it lasted.