IMO firewalls, IDS and IPS are anti-virus/anti-malware components.
This argument is solely about semantics, not functional protection.
Everyone protects their network in some fashion.
ok, lets move abit off topic ... how does everyone protect their networks? No need to go vastly into detail, but if you choose to not use AV I would like to know what you use to counter not having it.
The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it. Albert Einstein