You are most welcome to your opinion beekeeper_sd. I am not sure of the laws in the US, but in my opinion any chemical used in the hive regardless of where it is will end up spread throughout the hive (bees of course move from one box to another) and stored in the wax and honey. Same goes for using foundation, any chemicals in that will end up, at least in part, in any wax that comes from that hive and you certainly can't claim to isolate the cappings 100% from the rest of the foundation when removing it. Also, any chemicals that the bees come into contact with while foraging will likely end up in the wax. So, I personally won't use beeswax or any hive product that doesn't come from natural comb or comes from hives that are treated or hives that are left in areas where the bees are likely to come in contact with a lot of chemicals while foraging. I would also argue that the widespread use of chemicals in commercial beekeeping is one of the causes of Colony Collapse Disorder so on an ethical level I wouldn't use beeswax that supports that type of beekeeping. Again, just my opinion.