No anti-virus software? No Internet connection
news.com.au
news.com.au
Education yes, antivirus no. There are roughly zero active Mac viruses; the real threat is phishing.
At all of them, Linux machines were allowed to connect to the network without any fuss, and presumably Macs too. Windows machines were required to install university-provided anti-virus.
There was one little problem where the detection software they were using was checking for SMB support, and I got blocked because my Linux box had something running like that, but I called support and they worked it out.
Every large corporation I've worked for had similar rules and regulations and I left each and every one of them because of it.
Most virus nowadays are intended to do something over the net. If there aren't connections attempts, no CPU activity, no disk access, one could think that the machine doesn't host a spambot.
I haven't used virus scanner ever since one of them deleted my whole email inbox. Most of the time, they do more harm than good. They could also have security holes of their own, opening new attack vectors for their attackers.
Porn is a very serious issue out here. In addition, I cannot stand paying for bandwith (switching from "unlimited" internet to pay for what you use has been an issue).