I think the chance of getting poisoned from your zoas is one in million...or even less. Look at how many hobbyists there are, how many tanks we have, and how many different types of zoas we have (I probably have at least 30 different types of zoas and palys in my 90). It's not a widespread problem by any means, but it is shocking when someone does get hurt. Most species of zoanthids contain no toxins, it's just so hard to tell which ones do!
Unfortunately, Deeds has no clear message for aquarium owners. Some of the zoanthid species that he tested weren’t toxic at all, and indeed, many people claim to have handled zoanthids for years without problems.