Some people who buy a new bike love their new bike and it makes them happy, so they want to sell more new bikes to others who rode their old bike with them once. They want to express how much better the new bike is. Especially if people want to drive trucks from now on.
Simon, they mean no harm, and if all bikes are the same many will come to the same conclusion. But there will always be some who want to sell you a new bike.
Is it so bad to have that side of the argument on your forum if it helps people learn how to drive a truck?
Kate xx