Well, REAL ice cream is a little more specific - but in any case if you eat ice cream with real eggs in them, you're eating raw eggs. Ditto with mousse and other similar, non-cooked egg-based desserts. How come millions of people don't have salmonella?
To come back to the question at hand.
Despite what the media likes to do, salmonella isn't exactly a common thing. The majority of salmonella cases in the U.S. are from food products that are processed on a large scale, such as in a restaurant, food processing plant, etc. The reasons vary but generally point towards poor handling procedures such as cross contamination. This generally holds true for other poisonings such as e-coli or staph.
If you keep a clean kitchen and take care to prevent cross contamination such as washing your hands between food handling and using separate utensils for cooked and raw food products (or meat vs vegetables, as the Jewish do) and practice the age old mantra of keeping cold foods cold and hot foods hot, you can minimize if not eliminate food born pathogens. It's not rocket science here.
Besides, most ice cream, even those that bill themselves as "real" don't use eggs anymore. Egg is a thickener in ice cream and there are a variety of alternate thickeners available, both "natural" and artificial.
My grandfather raised chickens and I used to keep chickens as pets, the worst thing I ever encountered was this: