Thanks for pointing that out. I did not remember what I thought I did -- in fact it was *nicotine* that was the active ingredient in Black Flag (and other insecticides) for years.
You also asked about the vape juice. While most carriers (last I read) are propylene and triethylene glycol, and those have very low toxicity, I cannot image that huffing large quantities of the vapor can do wonderful things to your lungs/body/blood over time. I am not a doctor, but I am a...