I'm going to play devil's advocate a little bit here -- don't shoot me
I totally agree that the tetra bit was totally out of line - never for a moment forget that.
However........
In the simplest sense, there is no real mystique to marine fishkeeping. Adequate tank, adequate filtration, good water and routine maintenance and a healthy dose of common sense, and even *I* can manage a marine tank. I'm not a PhD, or a rocket scientist, I'm just an average schmoe who likes saltwater fish and critters.
The first time I
saw saltwater fish was when I was 12 and I saw them at Sea World --totally blew me away. Next time was when I was about 18 and I saw them in a friend's HOUSE -- curiously, the Regal/Hippo/Blue tang was the first fish I saw, and 18 years later I finally have one of my own (two actually.... they lived together for 4 years in another hobbyist's tank before I came to have them....).
The "Nemo Effect" is really not that much different from the way I came into the hobby - I saw it someplace and decided to do it. Sure Nemo's a cartoon - but how is the interest sparked in the hobby really any different than the way any of us came to it? Honestly, are there THAT many people willing to cough up a couple hundred dollars or more on a fish tank just because widdle Johnny saw a cartoon? If there are, I'm not seeing them in my place, but I don't get a whole lot of casual traffic (yet), as the mall I am in is still half empty.
Yeah there are a few retailers that won't ask questions. I'd betcha there are just as many e-tailers who won't ask a question or two before shipping off a box of Nemos, Gills and Dorys to the voice on the phone with a valid credit card number, but most of the bricks and mortar places that I know of (and I daresay they represent a reasonable cross-section of the retailers here in the US, in general), are responsible enough to ASK if the buyer has a suitable tank for the fish. The bottom line is it is always the end-user who is ultimately responsible - one wouldn't blame a car salesman if one wrapped one's new car around a telephone pole......
Jenn