SweetPotato, I have a similar background to you, but obviously a totally different attitude. My first few pregnancies I did everything right. Everything, including making myself sick taking prenatals. I was "perfect" for over a year and still lost 3 pregnancies. Then I started doing the research, realized most of the food no-nos are completely overblown and stopped caring about it. I had one very difficult pregnancy and now a comparatively easy pregnancy.
Also, if you won't do anything that could potentially harm your child, you've stopped going in cars, right? Because getting in a car accident is by far the most dangerous thing you can do while pregnant, and far more likely than listeria or fetal alcohol syndrome or toxoplasmosis, etc. So, if you really were consistent, you'd never leave the house. Why would you hold to restrictions that aren't actually backed by rigorous research but still do one of the most dangerous things possible?
I don't want to get into an argument over this, so I won't comment again, but I have to say that I find the hyperbole and being called inconsistent to be unecessarily insulting. I kind of expect that we should be able to have different opinions here without getting personal. I might also clarify that my dh and I are both published research scientists (with him now in a medical field), so I understand "rigorous research" and am capable of interpreting scientific studies, etc.
I think one of the things that we all do when making these decisions is to weigh not only the risk, but also the weight of the restriction. Not driving a car would change our lives quite a bit- more than I'm willing to do (though, to be honest, I drive maybe a max of 5 miles a day on slow quiet roads- not exactly the same as communting on the Jersy turnpike or something). But, for me at least, skipping out on spicy Italian Subway sandwiches for a few months isn't really that big of a sacrifice. I'm also of the personality type that I would blame myself if something went wrong that I felt I could have easily prevented. I get that not everyone is like that. It's not much fun, feeling that responsible, but it's who I am, and MUCH easier and less stressful for me to avoid a few foods than to go around worrying about it (which is totally what I'd do otherwise). I'm honestly envious of how some folks are able to be more laid-back about pg, and I'm being much more so this time around than I was with dd. But if I think I'd stress about something, then I don't think I'm bad or inconsistent or ignorant or something for trying to minimize that stress for myself. If doing a little thing like skipping brie helps me feel more confident, secure, relaxed, and happy about this pregnancy, then I'm going to go with it.