Well, an outright ban would make most corporate business in the EU impossible, which is why China hasn't even gone this far. I guess you could go ahead and try

Well, an outright ban would make most corporate business in the EU impossible, which is why China hasn't even gone this far. I guess you could go ahead and try to ban VPN's for private use, but frankly my suspicion is that this would not be easily enforceable, and on top of that would be easy enough to get around using a "poor man's VPN", ie, ssh -D. Going down the rabbit hole further, banning ssh would still leave the door open for things like stunnel, socks, or heck, even just http proxies. At some point you're asking to just change the way networking works in the first place. All to stop kids that can drive a car and meet strangers in person from chatting with strangers on the Internet.