Gimpy, I hate to burst your bubble, but the same dire warnings on product safety and misuse can be found on almost any consumer product sold in the U.S. Why? They have lawyers working for them and somewhere, at some time, someone got sued.
Li-ion batteries that we use in lights, like many other chemistries, can be dangerous if misused. Learn about them, respect what they can do, treat them well and life will be good. Agenthex has a point: I ride my bike 5-6,000 miles per year on the road. Believe me when I say I am much more worried about the guy riding 1 foot off my front wheel or the 2 ton car following behind us than I have ever worried about the 18650 battery in my flashlight.
By all means, keep writing and definitely have a section on battery safety, but try to keep it in perspective. You know if you drop a few Mentos in a liter of Diet Coke it will explode.....