I've been asked to help Facilitate an Internet Safety Course at the local Colleg

I would definitely mention phishing scams. Sometimes people think they're safe when they're reading their email, especially when a familiar name like their bank appears to be sending them a message. That's definitely not always the case. You should mention antispyware programs along with antiviruses. I rarely need my antivirus to clean an infection, but sometimes it seems like I could run my antispyware daily and find something new every time. Perhaps you should also cover how parents should react if they find out their kids are doing something online that they don't approve of, be it accessing adult sites (a computer-savvy kid will probably be able to get past many filters), bullying, meeting unsavory characters online, etc.