I don't think Ubuntu and Linux desktops prevalence in open VNCs is indicative of prevalence. They definitely seem to be over-reprensented in the various exemple

I don't think Ubuntu and Linux desktops prevalence in open VNCs is indicative of prevalence. They definitely seem to be over-reprensented in the various exemples I've seen of publicly accessible VNC servers, I would be curious to know why. Maybe there are more users on Linux who know how to setup a VNC server or maybe some popular VNC package has bad security defaults ?