if nobody buys, then the LFS won't bring them in. Customers demands drives business. That's what the industry is about. Imagine every LFS tell newbies not to buy any corals/fishes as much as they would like to sell, you'll won't see any LFS very soon.
Over the years, reefers gain experience and there is no right or wrong method. People can do only what their pockets allow them to do so. If someone chose to buy a 2ft tank to keep sps, no one can stop them.
You might as well open a SPCA equilvalent for Reefs if this happens.
People all over the world go to some sort of forums these days for any advice, and end up getting flamed because someone in the forum thinks he is the expert on that particular subject.
Watching all the words going back and forth from the sidelines really makes it more interesting to see how people can react so differently when they are behind their keyboards , with no face seen.
Just my 2 sandbits worth.