Actually, I agree with this:

All of the whining and hate threads should be merged into one, and all of the hate posts in other threads should be marked as off-topic and deleted.
Open a "Let's hate the N900 together" thread and merge all the wining into that one.

The other possible solution would be a more strict one:
After all, this is a Nokia forum, so no hate speech about Nokia or its devices is allowed.
Go and bugger off to Apple's or Google's forums (or whatever) and complain there about Nokia.