One significant benefit of OpenDNS is you can go whitelist a site/domain from filtering if it's breaking something and they have more categories than just 'Advertising'. I use it to help protect myself and my children from pornography.

I use opendns, the black/white-listing is a bit unrefined IMO, it does work though. The limit on the list length is quite tight on the free tier too.

I'd like to setup an add-blocking service, but I fear that I'll spend all my time admin-ing/whitelisting sites when a family member has a broken web experience. Is this an inevitability based on the nature of things?