Here come the Freepers who defend poisoning the environment. They are, I expect, at least strongly overlapping with Freepers who love to defend pit bulls and those who advocate the intentional killing of neighbors’ cats.
Do you drive a car, or take some sort of other transportation that uses petroleum? If so, there are some who could just as justifiably accuse you of "poisoning the environment".
The development of glyphosate, and the genetic engineering of "Roundup-Ready" varieties of crops have dramatically increased food production, and I'm not aware of any evidence that anyone has been harmed from consumption of those crops. (Or at least, from the glyphosate residues in the crops.) Plenty of tinfoil hat types will make claims about how harmful glyphosate is, since it is produced by evil corporations, but I doubt the risk is anywhere close to being as great as what there is from consuming prescribed medications.
I remember a doctor in Mexico who advised parents that kids eating dirt is healthy because it builds resistance. I would not go that far, especially with pigs roaming free.
The article I posted claims that Glyphosate may be a factor in the collapse of some bee colonies, but some bees' microbiota is resistant to the chemical than others.