As far as I know anyone can buy these cells online, whatever their age. Is that incorrect? If they go to a site that sells LED torches, chances are they will find that those using LiIon offer better performance. Hence they might want some.
For example, in the first post it says "Don’t overcharge your cells, don’t charge ‘m too fast and don’t leave ‘m alone."
And "After 15 minutes you need to check on your charging cells"
So if I understand this correctly, this means that chargers do not come with safety mechanisms to prevent overcharging, or charging too fast. How many people would check them every 15 minutes? My guess would be no-one unless they had read this thread. And how many people would unknowingly charge too fast if they thought they could get cells charged more quickly? My guess is many people would unless they had read this thread. (Do the cells come with safety instructions? Do people read them? Usually not.) I suspect most people leave batteries charging overnight. I have LiIon cells for consumer goods such as cameras and iPods and as explained elsewhere, these are safe because the chargers are made properly with safety measures, as are the cells.
The impression given by the first post is that these cells are unfit for sale to the general public. Of course you may disagree, but that is my opinion based on the information in this thread.