Eating healthy and bacteria

There are two pieces of a puzzle that finally fit together. First, there was a public debate (in Congress) following widespread use of anti-biotics in home cleaning products that followed reduction of price of this anti-biotic due to the end of patent protection. Second, Danone have started to advertise its "Activia" and DanActive, which are products widely used and advertised in Europe as containing healthy bacteria. I was surprised to notice that the word "bacteria" does not appear anywhere in the commercials.
Then I realized that most products sold here are "anti-bacteria", so nobody knows that bacterias can be good as well as bad. The idea that you voluntary eat something that contains those horrible, invisible bacterias is clearly unimaginable and would certainly bad way to sell.
P.S. I just saw another ad offering "living cheese" or something like that.
P.P.S. Most of the yogurts sold in the USA are really "dead" - there is nothing living in them (and I doubt that there ever was).