Just as different psychological effects ensue from cannabis products when eaten vs smoked, the health effects of eating vs smoking various pesticides present on cannabis products are likely to differ.

While some testing and monitoring of health effects of various pesticides when they're eaten from food has been done, we really don't know what effects those same pesticides will have when they get in to the human body through smoking. The smoking route of administration could potentially be much worse for some of them.

Elsewhere in the thread someone mentioned the possibility of growing marijuana organically. Well, organic pesticides aren't necessarily better for you than inorganic ones. Their effects really have to be studied on a case-by-case basis. Simply using organic pesticides isn't going to magically save you. Going pesticide-free might, but then, well, you have to deal with pests.