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bradley_phil - 7:52 pm on Dec 5, 2005 (gmt 0)
If you want to keep a thread on topic, non-physical action is often the best way - make a good on-topic post and use a fake account or other members on the team to use it to create momentum
I know Invision makes it easy to split/mertge posts and threads as you described, using a checkbox system (like you might deal with emails on a webmail system - check all the threads or posts to carry out a certain action, then choose the action from a list at the bottom). How much you interfere is up to you, really.