Sysadmins in important positions the world over use Bitcoin, this is why it could never be made "illegal" to own/use, the world's largest hedge funds, governments, and contractors would lose too many of their best networking/infrastructure professionals.
That said, this sysadmin needs to probably consider moving his node to a cheap VPS instead. I (and I'm sure other sysadmins) did over a year and a half ago when it became obviously people were snooping out IPs on the network.