The leaked hacking tool exposed a method of spreading malware across computers in a network using a flaw in Windows. Once a computer is infected with the ransomware, if that machine has not been patched, the infection can jump to other machines.
We should not be complacent with Linux though. I intend to keep thinking about tightrning up the security in Quirky.
For now, there is a good argument for taking the precaution of running SeaMonkey and Firefox as the "spot" user.