I recently turned my firewall on, and while running multiple rubies, I got the question
Do you want the application "stoned" to accept incoming network connections?
Clicking Deny may limit the application's behaviour. This setting can be changed in the Firewall pane of Security preferences.
After some googling, I worked out it wasn't a malicous app (and definitely not this stoned!), but maglev (presumably "stoned" being "stone daemon").
Unless I'm serving web content or otherwise acting over the network, do I need to enable "stoned"?