My local-est shop (where even my non fish appreciating OH refuses to shop, instead walking the extra 4 mile round trip to the decent one).....
To a customer with excited teenage girl...
"Ok so you have the bowl, the gravel a couple of plants, now lets pick your fish"
(she shuffles off stage left to get a net out of one of the tanks {to dip into another tank, even though all their tanks are on seperate filters and they dont quarantine so this will likely spread disease...})
Me: uh, hey sorry, are you picking fish for *this* fish bowl, cos you know they are probably going to die, and if they dont die because you have no filter and the tank isnt cycled (and wont since you have no filter), they will die because your goldfish have the potential to grow to AT LEAST a foot long and live over 20 years........
Customer: Oh well uh, the lady said...
Me: bugger the lady, if you want THESE fish, buy something like this (points to a 3ft juwel tank) and you can keep mebbes 3 in it, once its cycled which may take 6 weeks....
Customer to daughter: I think wed better leave...
Shop lady returns bearing net, looks confused, I smirk to self.
Another time in same shop....
To shop assistant "Hey, these puffers, you do know they are eating this betta alive...."
Shop Assistant: Oh he'll be fine he'll grow his fins back.
Me: "..." (waits for her to leave, takes net and dumps betta in with someone less likely to eat him)
And another....
Me: (bored and with nothing better to do than idiot bait)..." you know, these baby p's would prolly appreciate somewhere to hide" (eyes go funny watching baby p's hurtle about brightly lit front of shop tank with kids tapping on it).
Her: "Oh mine do that at home too, we have a tank in the lounge and they love to rush around"
Me "And those goldfish you have in there, is live feeding in front of shop in the day when the fish are all stressed *that* wise?"
Her: "grr"
Me: "Ill shop elsewhere"
Phones council, they get yet another arse kicking for this and many other things such as selling animals they are not licenced to sell....
Fortunately i have access to a much better fish shop now
Em