I have improved the first sentence. It needs expansion, of course you are most welcome to work on that.
I agree that discussing legal matters in an international encyclopedia is complex due to different laws in different countries, but that does not mean that nothing can be said on them, you can make remarks in terms of some/most/almost all countries; even a vaguer expression 'may be illegal' is meaningful, because many things are legal in all countries, such as the possession of a piece of bread.
Why is it silly to put a list of things you cannot possess in an article on possession? That is the place where it belongs, unless you make the list a separate article.
Additional separate articles are fine, this article gives an overview (extensions are welcomed). 
 12:29 Nov 28, 2002 (UTC)