Here’s something closer to home.
http://www.hometheatertalk.com/DIY_Projects/IB_Sub/ib_sub.html This fellow may already be a gunslinger.
As others have pointed out already, intentional mislead is part of everyone’s daily encounters. Its not just in the market places, it also exists in political arena (more so there), athletic competition and … etc. Its like virus, you can’t eliminate it in the real world. I believe there is a good side of it though. It forces us to become smarter just like our immune system adapting to new viruses and becoming stronger (usually). Chat rooms like this one and those who contribute their 2 cents are that of high value to people who pay attention. Those who don’t are relying on sheer luck.