In any case, a VPN is not the best technology to use for bypassing ge-restriction, since VPNs are designed to send all traffic, including audio/video delivery through the VPN tunnel.
A better option is to use a smart DNS proxy, which you can easily build yourself for the cost of a cheap hosted Linux server. This type of solution only proxies API traffic and leaves video delivery to happen across your local connection, with the benefit of your local CDN PoPs.
A private solution such as this, could possibly avoid all of this unpleasantness associated with multiple user accounts observed to be coming from a small IP space (or even single IPs).
DIY clone of Netflix Tunlr/Unblock-Us/UnoTelly on cheap US based VPS
Having said all that, response from Netflix suggests they are not doing anything to break VPN circumvention:
P.S. And then there is always IPv6