Let me suggest an alternative solution.
I wouldn't care if the troll posts weren't in the center of attention. Maybe we could have a forum category that is not shown in the active topics section. So trolls could do what they like there and no one who isn't interested is bothered with it. That would possibly spark less dissent since we wouldn't give trolls a new target ("maemo isn't open, they censor our opinions").
And btw. i find trolling is an art and troll posts can be entertaining and interesting if the art is mastered. Unfortunately i see more heavy-handed pricks here on tmo than trolls who master their art.