Sorry but I disagree, parental control isn't a security feature. Then there are these who would consider it bloat and there are plenty of parental control options out there for those that want it. You can also use OpenDNS for your DNS Server and that has parental control options.
Avast had its own stand alone Parental Program paid option, I don't know if it is still available. So if it were ever to make an appearance I would imagine it would only be in the Paid Versions and probably the suite.