I'm certain you could do it. You install ZoneAlarm (or equivalent), tell it to block everything (by clicking a checkbox or something), and allow or deny connection requests when they pop up.
You did make that claim, but whatever: "Honestly, the biggest reason to use a Mac over anything else may well be Little Snitch."
You did make that claim, but whatever: "Honestly, the biggest reason to use a Mac over anything else may well be Little Snitch."