Regulation is bad plain and simple.
Pet shops are by their nature irresponsible. Well that's debatable. Look at RTC's (as stated above). Any pet shop that buys more than one RTC a year is condemning a fish to horrible future.....OK I'll take back the irresponsible part about pet shops but as a person that sells things for a living, I refuse to offer the wrong product for the wrong application. Does that make me better than others or stupid? I could sell more products if I hustle people into buying the more expensive product or a product they don't need. I'm not better, I'm just human and I don't like being treated like garbage or a fool.
OK....pet shops that sell tank busters to folks with undersized tanks are irresponsible and not informing customers to the true nature of what they sell. In other words......selling a bad product. One that will perform in a certain manner and will require particular care and maintenance. They do not tell the customer what they're getting into and this is wrong. Just because a fish distributor stocks RTC's does not mean a pet shop must buy them. If a distributor does not sell them, they will not re order. Stop the madness and at the very least tell the customer the proper care requirements! Even a used car salesmen tells you what oil you need to put in your car for goodness sakes.