This seminar discussed internet security at a fairly abstract level, and showed how "internet security" is very similar to any other kind of security -- that, for instance, the human element is often the weakest point of a security system, and that "internet theft" is very very similar to any other kind of theft.
Teaching included the use of games -- either a nifty 'card-based' game ("D0x3d"), or a free-form 'what if' exchange, plus the usual lecture and discussion formats. Students, at the end of the class, had to give a presentation on a "security failure" they had studied, which could be on the net, or in other venues. They picked some fairly surprising ones!
