I think it is mostly up to the individual to insepct and act on any corals they want to bring to their tanks because even with people caring, pests can slip through.I know that I’ve been mainly just complaining here, so I’ll offer up some potential precautions/solutions
First off, I think its great how much the club emphasizes dipping coral, and will handing out KCL last swap was awesome. I think this is a great baseline in general.
I think MEN specifically should be discussed at future swaps. If any other pests start becoming a common problem, we should start mentioning those too. Having pictures, or having live specimens to view in person can help as well.
Technically these pests roam and can be anywhere in our tanks, but I think effort will be most efficient and best used focusing on the targeted species, montis/anacropora/porites. People that want to bring these to the swap should check their frags daily for one week before the swap. Check 1 hour after lights out, one hour before lights on, etc.
We should reach out to professionals to see if they have any more input/suggestions. Maybe @Thales can have some good information?
This is just what I came up with off the top of my head, I will add more if I come up with more ideas
For id and stuff, Marc Levenson gave a good talk about pests in December at the Boston Reefkeepers Society (don't watch my talk because I'll be giving it to BAR on jan 11 haha)