Here's one to keep the thread going:
Had a customre win a Biocube 29 in a raffle the store was having. It was an older couple who were really nice, but the kind of people that would ask questions and then when they got an answer they didn't like, choose to defy them.
Fast forward a few months, a lot of questions, and one overstuffed biocube, the gentleman comes into the store with a bag of xenia and a frown. He tells me that the xenia crashed his tank. He said he saw it spewing brown stuff after he removed all his rock, and the brown stuff killed his tank.
I stop him and ask "Um, you removed all your live rock?" He says yes, it was "Dirty" and he didn't like it all purple, so he threw it out and bought new rock at a different store. He said the next morning he woke up to find the xenia spewing the brown stuff, and all his fish (minus a yellow coris smart enough to bury in the sand during the crash) dead, and he wanted to get rid of the xenia.
I try to explain that his tank crashed because he just "threw out" all his biological filtration, not because the coral was pooping! He doesn't believe me, and wants to buy more fish! I tell him the tank's not ready and he needs to wait for it to cycle...again. He says to me, and I quote "If I buy these fish and they die, THEN I'll know I have a water quality issue!" I refused to sell him any fish.
I wonder if that poor coris made it....