Well, it really isn't the person's fault because a lot of people turn to bike shops for help in purchasing a bike. Because Trek is so widely carried in bike shops, many of which do not carry Haro or Hoffman Bikes, they get in some Trek BMX bikes and go "These are some excellent bikes here from Trek." even though they don't know what they are talking about.
The 'experienced' bike shop sales guy actually is USUALLY clueless when it comes to bmx and freestyle components and bikes. They know that aluminum is the best braking surface for mountain bikes, but don't know that because in the world of freestyle we stay out of wet environments, chrome plated rims are the best for our bikes. They recommend aluminum instead of chrome plated... They just don't know.
Trek isn't BAD - it's just as I said, piss-poor design. A more accurate statement is that they could change about 5 or 6 little things on the bike to make it a highly recommended purchase, but they miss the mark on those 5 or 6 things that other companies do not miss the mark on.
Lucky you - you asked first!