I think differently. BT is regulated out the wazoo. If you smoked cigarettes and did not know they were bad for, then there is something wrong with you. Even the packaging warns you.
They make a product and it isn't that bad. I have used them and don't mind them at all. The only issue is they are as expensive as can be. Form factor and ease of use is top notch. The flavoring isn't bad either. My guess is they won't blow up in anyone's face either.
I tend to leave my tin foil hat in the closest for after a case of beer. I have always wondered what will kill me first the beer, smoking aluminum foil or the government.