It might be best to just give out vague answers when asked about it or I guess you could stop taking it to events, let others bring it and see what happens.
I remember there being a discussion once in Ann Landers about how she would give out her "perfect rice recipe" but then people would substitute certain ingredients and then complain to her that her recipe didn't work
. You would think that substituting instant rice for regular rice would be something most people would think could be problematic, that knowledge, it turned out, was not widespread. Kind of related in that giving out recipes always seems to come back and bite you in the behind in some way.
I don't think you are going to get the do it yourselfers to cool it so it may be less aggravating to just stop sharing and let them figure things out just like you did.