Of course I would feel bad if something preventable happened, I'd probably never forgive myself. But when I weigh up the possibility of that against having a fussy, allergic child - I come to the conclusion that there's a much, much higher chance of the fussy, allergic child due to non-exposure.
DD is allergic to apples. I ate them during pregnancy, not devouring them but ate them. I read about someone who couldn't get enough of tomatoes while pg and her baby was born totally allergic to them. I understand there's the theory behind peanuts and allergies passing on to babies, but I think that can happen for any food and there's no concrete way to tell. DD is also a very fussy eater but I can't see how me avoiding certain foods while pregnant caused her to be fussy. But we're talking about listeria, not allergies

I have no problems with people who want to eat whatever they want and do. My choice for me is that I'm not comfortable doing so.