Disable a specific user's ability to give rep to others

[DonosOdD]

Here's the situaysh:

A member of my forums was giving negative rep left and right as he pleased, and disregarded the staff's advices. He was banned for that but I want to avoid banning from now on, so I figured I'd disable his rep, right?

Wrong. His rep is disabled in the admincp (I don't allow users to disable it themselves), but he still can give and take rep points. How do I disable that without disabling it for everyone else?

Thanks in advance.

[kh99]

Maybe you could copy the "Registered Users" user group to a new one, disable reputation in that new group, and move the guy to the new group.

[DonosOdD]

I thought of that, but I wanted something more practical, like an addon or something in the options I overlooked. If it's the only way, though, I'll take it.

[Max Taxable]

That's what I did, new usergroup, titled "Children." Children also can't leave visitor messages.