As I see it one of the biggest problems this industry faces is the ignorance of the customers. The customers dont know the difference between a properly designed and professionally installed system and a hack job. More often than not they select a contractor base on price and assume all contractors will provide equally functional systems. If the customers were more informed when soliciting bids then the hacks would have to meet the same standards as the pros. I would suggest the industry develop a video explaining to the customer what makes a good system. The video should provide the information a customer would need to ask the right questions and make informed decisions.
If you tell the truth then you don't have to remember what you said. Because the truth never changes.