You shouldn't be laughed at. You will test positive for nicotine from eating them. They, including tobacco, are all from the nightshade plant family.
Believe me - I know that, which is why I have been bringing it up for years. I get hit with ridiculous quantities of those veggies that must be eaten to equal the nicotine content of one cigarette.
My buddy Lockjaw has done extensive work on the issue of testing for nicotine, which actually can't be tested for - it is a by product of nicotine - serum cotinine - that I believe what is tested.
lock, old buddy - can you help me out here????