It tends to be very quiet around here. Im not sure the Voipo guys actually show up much here as there is not allot to see. Especially in the BYOD section.

There are many whom have run a PBX in the past with no issues. If you do and can make it work I don't see why anyone would care as long as you do your best to secure it.

If your worried about your ATA sitting in the open.. why don't you look into a solution like pfSense or Smallwall to replace your present router/firewall? Then you can secure things by making firewall rules which only allow Voipo servers access.