Use the report feature in my opinion. There's a specific option for it:
Quote
Wrong Forum
All topics and replies must be on topic and relevant to the discussion content and sub-forum it is created under.
If there are a LOT of them contained in a forum which really isn't about music you could also gather the links and PM them to a user in the staff group which moderates the sub-forum in question.
Hope that helps, voted no because ultimately, if they really don't belong in the particular forum or are irrelevant to the topic - and you report it - it will get moved to the appropriate section when it's reviewed anyway
