Free DNS, safe? #question for wendell, logan or kane#

Your video on VPN's has reignited my interest in changing my  geolocation for services like Netflix and I now use private internet access and open vpn on my PC's.

 

I have a WD TV Live box and use a "to pay for" trial of a DNS provider to watch Netflix usa.

Question...

is it safe to use a free DNS taken from the internet on a dumb box with no protection other than my routers firewall.

The box has a usb HDD with movie files on it

 

Thanks

ps would like you to do more reviews on DNS VPN relocation providers and info on the providers host country's data retention laws, for example do Canadian VPN's keep logs now