Hahaha, I completely agree with this. I have a Neon in my Damsel tank at work, and he is the king. A guy I used to work with does tank maintenance, and he got this fish from one of his customers. The fish is beautiful, one of the brightest fish in my system, but there's a reason he was brought to me haha. My friend goes through each tank, looking at who's inhabiting them, and just says "He'll be ok in here (with the damsels)." Then he says, and this is straight from his mouth haha, "If someone wants this fish, and you really like this person, DON'T sell them this animal."