Sandy the image will be fine dont change for anyone it will show the fun not too serious side as i said earlier.
You are quite softly spoken which will help with the image thing, the hair will be a talking point so use it to OUR advantage, show some pictures if you can of the Thai people enjoying your hair, smiles and all! With the kids laughing or amazed at the hair, it will show the mixed demographioc of our society and also the lighter side of Muay Thai.

Push forward your charity events and also other things that you know have been done by our community relating to Charity fundraising, helping people back on their feet (Master Sken and Dave Croft's story, maybe worth asking Dave and M .Sken if you can mention that)

How many of us were on the road to nowhere before we found Muay Thai? (or Muay Thai found us?) maybe a few lines from all of us about the benefits Muay Thai has brought to us as individuals so Sandy can use that as reference for some questions, come on folks lets work together and help Sandy to help us, not knock him cos he got crazy hair and is a mental case.

Use Kicking 4 Cancer and Rich Westons passion for that(Get Rich's permission first though), include the support that he had from us all on events, how much money has been raised anyone know?
Rich? Master Sken? Sandy?

If they start pushing you about the violent aspects ask them why? ask them if they want to show a balanced view or are they only interested in the violence aspect, that will shut them up mate.

Oh, and by the way, everyone, you can bet your bottom dollar that they research this forum, other forums, your own forums, websites and blogs weeks or months before they even invite anyone to do a programme!!!

Knowledge is power.