Some fish never stop biting.

Which sums up what trolling is all about. And why it gets boring pretty soon, even for practitioners, I suspect.
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This thread has drifted a bit. To get back on course, I see that the suggestion that Powell only endorsed Obama as a matter of black-on-black solidarity was put up by aprominent Republican John Sununu, only for him to try to wriggle out of it, presumably after realising that it rather reinforces the view that a hell of a lot of the people against Obama are against him for the very same reason, that he's black.