A kind of genetic engineering happens in nature, with naturally occurring mutations and the dominance of certain strains. What is different about today's processes? What makes them potentially dangerous? What should we consider natural and what is artificial?
Genetically modified food is a hot topic. Most of us don't know much about biology. It is very important in this question that you actually understand what is meant. Don't assume you know, find scholarly information on line. Be clear. You often hear the term "natural" bandied about, it's a really big marketing slogan for sure, but most of us have given little thought to what it means and the assumptions and implications involved in its use. We need facts and data, thoughtful arguments. You'll need some idea about what genes and genetics are. It is also helpful to get some facts on how genetic modifications in foods are used. - the purpose of genetic modifications. You'll find a lot of material on line about this topic. But you need to select your sources carefully. Genetics is probably the single most important concept in biology today.
Few scientists have much concern about the effects of GM food on humans but a number of scientists have very serious concerns about the affect of GM plants on the whole ecology.
The technique your describe is quite remarkable and raises all kinds of difficult questions about traditional ways of thinking about fertility, pregnancy, and parenthood. I'm not aware that some of the more frivolous uses like hair color have been utilized. Its a bit for complicated and costly than that. Did you find confirmed cases?
Why do you think more people are becoming gluten intolerant Michael. As a result of marketing many more people seem to think they have a problem with gluten but I've not heard of any scientific evidence that people become tolerant of gluten with the natural reactions that some of us have to certain foods. Did you find a website on this question?