I strongly agree with this, but I'd go slightly further and say your domain registrar should be entirely independent of any other services. At one point I had

I strongly agree with this, but I'd go slightly further and say your domain registrar should be entirely independent of any other services. At one point I had my domain registered through my ISP, which was run rather eccentrically by a gentleman I eventually had a dispute with. He then (probably illegally) disabled all my DNS records, leaving me without my main email account for a week at a particularly vulnerable point in my life. It was horrific.