Yes Gregt I agree with you better safe than sorry. However, the message that seems to have got through is:
"Don't buy any zothanids if you want to be absolutely safe."
While such a message is indeed safe it is also irresponsible. Yes on the one hand we have to consider the potential accident that zothanids can cause we also have to consider the financial impact that such a message will have on the aquarium trade and the many people that makes a living from it.
What I am trying to see is if we could CLEARLY IDENTIFY exactly which species of zothanids was responsible for the accident so people can take extreme caution when handling such species.
I have since done a search and have came upon this thread which has pictures of Kevin_Kramer tank:
http://reefcentral.com/forums/showthread.php?s=&threadid=115517
As you can see, he has a mixture of zoanthus and palythoa in his tank. On the bottom right there is a large colony of palythoa which could well be the culprit, but he also has some individual palythoa polyps on one zoanthus colony.
From what Eric Borneman said there is very little research into exactly which species of zothanids has what toxin and at what concentration. However, one would assume the little reseach that has been done were mainly concentrated on species such as parapalythoa and Palythoa toxica which are known to contain Palytoxin, as researchers are generally interested in Palytoxin itself and its potential medical applications.
Before I came upon this whole debate, I had always assume that any zothanids that has "large" polyps are Palythoa and potentially dangerous and any zothanids that has "small" polyps are Zoanthus and are much safer. As Zoanthus tends to be the ones that exhibit the many wonderful colour varieties one would assume most zothanids in the aquarium trade are relatively safe.
Thus could we change the message to something like:
"As it is not known exactly which species of zothanids has what and how much toxin it is advisable to handle them with extra caution and not leave them accessible to pets and children.
However, most of the small polyp colourful varieties that come to the aquarium trade are probably safe though you are advised to take the same precaution."