I'm not sure what work I have ahead of me? If someone on this board decides to sell things to people, who have no experience or not the proper equipment to keep the coral alive, then they're no better than a guy at a LFS selling what they have in their tanks, regardless if it will makes it or not. You also see quite a # of people here put out requirements before they sell their corals. Some even to the point where they wouldn't sell to a person unless their tank and equipment meet certain requirements. This is something you also see from the vendors here too, though it could probably be better. People here need to take responsibility not only when buying things but also when selling things, and anyone having a problem with that just shows they have no respect for living things and it's all about money, what they can sell and what they can buy.
It doesn't take much to ask the person buying what's in the their tanks, how long the tank has been running, equipment they have and past experiences keeping the item that they're going to buy. Not only could the person then decide if they should sell the coral but they maybe able to give the person advise on what to do or help correct problems that they person maybe having.
As for voicing my opinions, well that's is something I can do as can other people here. As for selling things, whether livestock or equipment, I have and do let people know if they should buy something or not. I have not sold things to people because I didn't think that they were ready for that participle coral or fish or their setup wasn't good enough. I've probably talked more people out of buying things, even from me, then things I've sold, and I'm not the only one of this board who has done this.
As for the frag swap, well the people selling should be asking for tank requirement before selling their live stock. That's the least anyone here can expect, not only from the vendors but anyone selling. Considering this is a board, where advise is giving out, anything less would be unacceptable.