I got a response from my complaint to the BBC:
Dear [MoJo]
Thank you for your e-mail.
I understand you’re unhappy with the ‘Have Your Say’ messageboard as you feel it is being used by BNP and far right extremists to air their views and you feel this is inappropriate.
If you disagree with a moderation decision please email Centralcommunitiesteam@bbc.co.uk. The Central Communities Team will then review – if an incorrect decision has been made you will be notified. Please note that while the Central Communities Team are happy to review the decisions made by the moderators, they will not enter into debate or discussion. Once a post has been reviewed, the Central Communities Team decision is final. Please do not send multiple emails, or additional/subsequent emails once you have received a response about a posting from the Central Communities Team.
I appreciate that you feel with the current structure of the messageboard it is easy for groups, like BNP supporters, to rise up the recommended list and that something needs to be done about this so that the messageboard is more impartial and so I’ve registered your comment on our audience log. This is a daily report of audience feedback that’s circulated to many BBC staff, including members of the BBC Executive Board, channel controllers and other senior managers.
The audience logs are seen as important documents that can help shape decisions about future programming and content.
Thanks again for taking the time to contact us.
Regards
Joe O’Brien
BBC Complaints
[Emphasis added by me]
Looks like they are at least aware of it, and hopefully will now do something about it. In the meantime setting up a counter-hijacking Facebook group is starting to look more and more attractive.