I think when pg you are also more susceptible to food-poisoning causing bacteria, like listeria & salmonella, as your immune system is somewhat compromised. For me, well I would prefer to not take the risk of eating high risk foods, I'm sure I can live without deli meats & runny eggs for the next 6 months, however I know that if something happened to my unborn bub and I had done something that could have caused it, such as eating high risk foods, it would be a very difficult thing to overcome... they aren't rules so much as guidelines, no one says "no you definitely cannot eat this food" it's generally just recommended you don't, and its up to the individual as to whether they are prepared for that level of risk or not.