Tokis, I do agree with you that buying a poorly fish from a neglected store only helps the store, and I agree that even though this subject has been beaten to death, if it still creeps up, obviously it still must be addressed. There is nothing new under the sun and just because one person has debated the subject and is satisfied, does not mean everyone else has gotten the chance.
I have a couple of rebuttals for you.
First, although a store is generally neglectful, it does not mean that the poor condition of their bettas is always their fault. I recently rescued a pair of bettas that had been dumped into the same cup together. This was not the store's fault, as I am sure a customer did that, but I happen to know that the store does not medicate injured fish, so I bought them and took them home. In this case, I do not believe that a scene was warranted, but it was still a 'rescue'.
Also, it is not necessarily true that the store makes the majority of their profit off of the fish. In reality, the majority of any pet store's sales are not from the pets, but from the accompanying equipment required to maintain those pets...especially when it comes to fish.
Now, regarding making a scene. I'll be honest with you, I am not comfortable with confrontation. I am not the only one. There are many people like me that want to help actively, but are not bold enough to make a scene. Therefore, I buy fish that need my help. I suppose that means I am a bad person. Recently, I have tried to be more active in notifying management and making complaints, but I am still hesitant to do so.
I do not think that I am a bad person, though. I think that I am doing the best that I can within the restraints of my personality. I am trying to reach beyond my comfort zone to do what is right, but it is not easy. I do take it somewhat personal, though, that in my efforts, I would technically fall into your definition of a 'bad person' since I have taken these factors into consideration and still choose to buy the fish that needs my help, whether I make a scene or not. I am willing to agree to disagree with you in regard to this matter, but I feel that the matter is not as black and white as your post makes it sound. There are exceptions and extenuating circumstances.
Especially with newbs, to present opinions as fact can really bring a person down, especially in a case where they are only trying to help. I admit that no one should let another person's opinion dictate their actions, but at the same time, no one wants to be thought a bad person for something they were doing to try to help, either.
Because I am not a bold person, I applaud the efforts of people like bettamomma. As often as I am comfortable with, I try to leave them behind, but sometimes, I will just rescue one that really needs my help. You can think of me as a bad person, it will not bother me, but I please ask you to try to give the benefit of the doubt to others who are also trying their best.
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) ) 
I was typing to you and called you someone elses name..and I hoped I got it fixed before you saw it lol. 
