There used to be a "feedback" feature for buyers and sellers on the forum. It was less than perfect in my opinion and glad it's gone. I can't say much about Aquascape since I haven't bought a fish from them in about seven years (and the purchase went very well).
Its not just one review you know when there is a pattern of this then one needs to take that into consideration. We live in a world of word of mouth to reviews or else we would be buying blindly. Honestly I don't buy too many products online unless I've seen it in person but fish is a whole different game. Each fish is unique and has its pros and cons. I get it if they die at transport but none of these stories were about death of a fish it was sad to say sounds like a craigslist scam story where people are getting the run around trying to get their money back or fish.
For the record, MFK staff did not delete the complaint threads. Vendors have access to manage their own forums.
