This becomes a bigger problem when you're dealing with quoting. Suppose I wrote something like: "As MrCharles said above, it's a grey area, but...". So then w

This becomes a bigger problem when you're dealing with quoting. Suppose I wrote something like: "As MrCharles said above, it's a grey area, but...". So then what? Do we scrub all mentions of your username down the thread? What about typos? Don't get me wrong -- I'm all for a scrubbing mechanism -- but it's a complicated problem.