Usually servers get hacked by remote logging into the machine itself, don't they?
Wouldn't a firewall protect a server, perhaps even one running Open BSD as a hardware firewall or a Sonic Wall?
I guess anyone could do anything, but M$ is so much less secure and so much more popular that a firewall and common sense should be enough to protect the typical mid to low risk Linux user for quite some time to come.
My greatest fear is my laptop physically getting stolen. I would like to have the whole drive partition encrypted instead of just the /home directory, but that it one of the tradeoffs between Mint and Fedora.