How to disable https for one user and all browsers?

[John Musbach]

Hello, I am installing parental controls for someone and as good as
they are I have come to realize that they cannot filter https traffic
and as a result any measures set by the parental controls can be
easily circumvented should a website support the https protocol. How
can I deny the users attempt to utilize https traffic no matter what
browser he/she uses? I realize that this could be done via a ipfw rule
but that rule 1) would disappear each reboot (I have tried before
adding rules via the Terminal and while it works, those custom rules
seem to be removed each time the computer is rebooted. The only rules
that stick are those that are added via the Firewall preferences and
that area does not allow one to select ports to deny, hmm...) and 2)
would apply for all users, I would like something that sticks across
reboots and only applies to this one user. Thanks!

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Best Regards,

John Musbach