YF everyone has their own choice as long as it is an informed choice, and I would be the first to defend that right

I do think that information and education on these matters is important though. There are newbies here starting out on their adventure and I would not wish to be a party to telling them they should use colourings or any other hazardous stuff without informing them of the risks. If you have read the article I linked on hints and tips you would see the amount of concern there is within the business community and the health authorities about the number of restaurants/takeaways that are flouting the guidelines on additives. They are closing some down because of it! This also applies to spice providers; look what happened to TRS (Sudan Red issue).
If someone wants to eat or make brilliant red CTM (in my opinion crap)
and they are well aware that they seriously risk getting bowl or other forms of gut cancer then so be it.
I am not having a go, but perhaps because I am close to the Health & Hygiene issues and have a sort of relationship with Health issues I do get concerned and I don't mind if people think I am being anal. At least I have done my bit. There are others in the health and Hygiene sectors who contribute to this Forum, and I am sure they can put their case forward better than I. If we are going to have a fully rounded Forum for information sharing then these issue should be discussed and debated as you quite rightly are doing, and I hope other will join in rather than lurk.
As for your comments on Tandoori Chicken and CTM; we produce both in our business and they are rated very very highly, probably the best on the Island and neither have any banned or controlled colourings. We don't knowingly use any ersatz additives or colourings just the natural ones. However the Readydy made powdered spicesand pastes are still at risk, e.g. Sudan Red, so you may well be using banned substances without knowing it. Please follow this link
http://www.laboratorytalk.com/news/rea/rea128.html which is one of many relating to this subject matter.
Trust in your trip and smell the coffee
CP