There are so many bugs and pesticides in commercial weed should have a hard time smoking a joint unless you really know the person handing it to you. If you are concerned about that you better grow your own. I found an ounce or so of weed awhile back and although I couldn't see bugs in the buds I could not tell if there were pesticides in it. I still have that ounce sitting somewhere, but haven't smoked any of it yet.