Haha yea my friend said bong @ the headshop once needless to say they kicked him out shortly after. Gotta follow the rules! Most places will tell ya b/f you even open your mouth so you can screw yourself outta buying, ha.
Get a lux mini perc! They're 40-50 more. If you live in a major city you likely have access to them; unlike myself who had to acquire one in New york. It's likely the smoothest and most gorgeous bong I've ever had the pleasure of hitting. You can't go wrong with a nice GonG though, aslong as you treat it with respect and keep it clean.