I'm not sure if using VPN is really a good idea because this is also one reason why some accounts have been blocked. If an exchanger allows traders coming from other countries, I suggest not to use VPN.
I can say that Binance is not strictly against using VPN. There is no term relating to that. But of course, just use it if it's necessary.
Not sure though for Binance USA. US customers, if I'm not mistaken, are way more being regulated here compare to Binance Global users.