I have a bone to pick with some people about flawed logic. I recently heard someone defend smoking marijuana because "it's natural". Now, the right and wrong of such behavior goes beyond the scope of this rant; what's at issue is the reasoning involved in its defense - a little consistency is in order. As it happens, ricin is a deadly poison used in chemical warfare that is - you guessed it - naturally-occurring. Are we therefore to conclude that ricin is perfectly safe? It is, after all, natural. No thanks. I'll pass. What I'm saying basically is do what you do, but if you feel you have to defend it, surely there's something more compelling than "It's natural".