I'm really wondering what the point in taking Interact down just because of IQ is.
At least in school, when we had to do extra homework because of one person, we could beat that person up. We really don't have any recourse here. And unless you're prepared to take Interact down permanently, and in the progress drive away all of the people that help you support your product and beta test it, then you're blackout period is just a futile gesture. And even if you don't do it permanently, but you do it repeatedly, it's still only going to serve to piss off the people who have done nothing wrong (and did I mention, help you support your software and beta test it?).
Either way, it's pointless, and rather absurd. Don't take it out on us (and ultimately yourself) because you don't have the technical ability to ban him and keep him banned.