But, if it makes you feel any better I get the same reactions when I tell people about the dangers of splenda, nutrasweet and aspartame. The think I'm a quack.
But I try not to care too much. Because there are also some people who believe what I say and are thankful that I tell them.
Regarding pushing it or argueing the point, I firmly believe that you have to wisely pick your battles and keep in consideration the time and the place.