New Bould, you wrote "I want to keep both the pies and the member," so apparently you are the organizer or leader of this session. Am I right?

So here we have a member who wants pork pies banned. Who's going to get the unpleasant job of telling people their offering is not welcome? You. Who's going to get the benefit of this unpleasantness? The member.

Should the effort you make to run the session be rewarded with unnecessary stress and hard feelings? I don't think so.

If I were you, I would ignore the whole thing. If the member says anything further, just say "I've thought it over, and tt's not worth the hassle."

PS You may find that in a few weeks the member has forgotten completely about it. I've seen things like this happen.