The stains that come from cigarette smoke are loaded with tar and 3,999 other chemicals and compounds. Tar is a very dark and binds with many things...very sticky. It can coat your tongue, your lungs, stain your teeth, and the smoke that has tar will stick to walls and months later mixed with humidity will start to actually form streaks on walls of rooms in your house. Yuck.
Nicotine is actually a clear liquid by itself. Also, the vapor that we produce when we take a hit from our PV's dissapates and is broken down very quickly in the air due to the nature of the PG and VG. So no...you will not see the same stains as you may have seen from smoking. No tar.