Re: @RAMChYLD - Well...
Well, my company, a Fortune 200 company, uses antivirus on our *nix servers.
As for Youtube, you do realize that watering holes are not only there, right?
I've received notices for regional government sites serving up drive-by malware and even some BBC IP's as well.
Add in malvertisement and you have quite the suite of threats out there.
BTW, the treat that caused Cyber Command to be pushed to the forefront for bringing into operation was Agent.btz, which was PRC malware spread by USB drives via autorun. The idiot contractors for the DoD didn't follow best practices or even the DoD mandated baseline.
I know, as I was there, running information assurance for the only installation that remained uninfected, for both incidents (they cleaned it up, then re-infected again a month later).
The first incident cost one billion dollars to clean up, as they literally cleaned out the entire DoD of system administrators to help clean up the infection. The second incident cost still remains classified.
Wouldn't want to get a large DoD contractor in hot water, they might not hire you when you retire from the military!