Several random answers to this poll, all of them "no, because ...":
1. No, don't ban the person from access to read or write in the boards. If someone is threatening to do lots of harm via his activities on the message board, an admin simply needs to go in and switch the threatener's preferred language to Korean. It will take him a week to figure out how to switch it back, and by then, he'll have cooled off.
2. No, don't ban the person from access to looking at our dirty laundry. Exactly how much harm can a person do on a message board, or with the contents of a message board, anyway? Nothing on the Internet is watertight. If you have posted something ugly here that you would not say to the person's face, and cannot allow to be said to that person's face at all cost (even the cost of friendship with another person) perhaps it shouldn't be posted here in the first place. A community that adheres to the Golden Rule shouldn't need to be hidden from view.
3. No, don't ban the person from your community. You don't cut a friend off from your community because he isn't perfect, and has moments of anger, or vengefulness, or protectiveness, or smallness, or stupidity, or craziness, or divided loyalties, or drunkenness, or some other reason you probably don't know about. If you did, you'd quickly end up with a very small community - a community of yourself only. All people do things we disagree with. That's what makes life more interesting.
4. No, don't ban the person from his community. It's really traumatic. I wouldn't wish it on anyone. Well, one person, but she's not in this community.... yet, and I admit it would just be for the revenge aspect.
5. No, don't ban a person for an offense that does not match the magnitude of the punishment. Saying something to 200 people in a whisper, then insisting that it is "confidential", then expecting no one to even paraphrase what you have said is unreasonable.
6. No, don't stone a person if you live in a glass house. I've said things to others about what I've read here, everything from public stuff (the Pope dying) to more personal stuff (I told TheDaimonLucifer that he had been put up for vote twice, and not received a majority of approval, based upon some of his actions many months ago in TORC. I did not name names.)
7. No, don't punish someone for actions not yet taken. That's not how a democracy works. If you have secrets here that cannot be protected, get rid of them. Don't get rid of all people who drink, get angry, get hurt, or get crazy, on the off chance they might do something, or even threaten to do something, in the future. Again, you'd have a really small community by the time you were done.
8. And for all of you who are holier-than-thou about not banning people for threatening to disrupt the board, I might point out that we have already "pre-banned" quite a few people - by voting their invitation down - on the chance that they might disrupt the board if they were allowed in. By being a closed board, we are in the business of banning some now, and banning others later. Do we want that?