Yes, it would show up, and probably would cause the person to not be hired or to lose his/her job, even if they said it was to kick the habit. Nicotine is nicotine, in the urine. The ban probably covers ANY nicotine usage.
There are lots of potentially hazardous and/or unhealthy activities that people engage in. Where does this slippery slope end?
Eating too much ice cream could eventually lead to health problems and an early death. Should that be banned too?
Bottom line: liberals want to control your life, they want to make all the rules, and they want to run the agencies that monitor you.