I work at a pet store, and I explain probably three times an hour that goldfish can't be kept in bowls. But it does it's job, because people that really want a fish in a bowl wind up with Bettas, and those that really want other fish buy a tank, filter and heater. I have yet to turn away a customer by giving them proper information. A guy really wanted piranhas, so I explained he nitrogen cycle and all the requirements of the piranhas, so be went out and bought a 90 gallon, then came back a few weeks later and bought 6 piranhas. He still has them and comes in every week for feeders and the like. I have a lady who has a betta, and she performs tests (ammonia, nitrite, nitrate) every day. Sure, people are frustrating, but they're not evil and when they realize that keeping a goldfish in a bowl is cruel, they set up a real tank or pond. 9 times out of 10 the right info creates regular customers who end up spending far more than they would have on a goldfish and bowl, and remain happy with their fish. So you can do things right while working at a pet store. Just wanted to throw that out there.