Unfortunately most people do not consider fish pets. They are mere children "toys" you win at the carnival. I dont have any malice towards those people, after all we stuff edible fish into tanks that are so small they cannot even move, and then smack their heads in and gut them for "seafood". That's the same indifference most people have towards hobby fish. And can you really blame them?
A great nature preservist named janine benyus once said "In the end, we save what we love, we love what we understand, we understand only what we have knowledge of" That rings especially true in fish. The best thing any of us can do is to educate the uninformed. And sometimes we just have to accept the fact that not everyone have the intelligence to listen & learn.
I remember before i started this hobby (less than 6 months ago!), in one of my parents' friend's party, i saw a large silver arowana been kept in a tank that's one and half times his body length!! Everytime he tries to turn(barely), his tail smacks the glass or the heater. At the time i had not a clue, and thought like everyone else cool fish/tank. Now i know what fish that was and how badly overstocked the tank really was. I would definitly said something to the owner if i had that knowledge back then. Ironically the owner is a college professor too, someone who supposely are smart enough to understand the concept of research before execution. Guess he just doesnt care about fish...yet.
anyway didnt mean to ramble on, yeah take a picture of the 5gallon...it will be (worst) tank of the year