As far as I'm concerned I think that everyone who owns a computer should have a decent anti-virus system. The other problems can affect you, but a virus can affect you and everyone in your e-mail lists. As citizens of the Internet it should be incumbent on us all to prevent viruses from infiltrating our systems and being sent to others. As for slowing down our systems, we have speed limits posted on every roadway to protect ourselves and others even though our cars can go much faster, and we all think that's a good idea.