There will always be instances where you just don't like one forum member or another. And, as forum owner or admin, you could easily ban that person for no reason. It's your site, who can tell you otherwise. But, what if there is no valid reason to ban them? Maybe they just annoy you with the know it all attitude or there's another petty issue underlying. Or, worse that person is super popular on your site, so if you ban them, then you might have other members leave in protest. So how can you deal with a situation like this, where there's one person on forum you really don't like? It's your site, do you ban or just keep your distance?