Activia yoghourt is dangerous

Activia yogourt was originally like any other yogourt - made of milk, a thickening agent, fruit, and some "good" intestinal bacteria, but it advertised itself as "regulating your digestive system" and the probiotic bacteria did not do enough of a good job. So some very clever company person remembered that carrageenan (from seaweed) damps down bacterial and fungal growth. Initially, everything works well, but over a long period of time - several years - this carrageenan finds its way into intestinal cells where it causes damage: lysosomes that ingest food particles and carrageenan cannot break carrageenan down. But they release their digestive enzymes causing ulceration.
The people who eat Activia are going to be in for a rough surprise when this happens - especially as Activia seemed to work so well for them earlier on. So these people will eat more and more Activia and more and more carrageenan thus damaging themselves even further.
The Activia ads are manipulative: "Activia makes you feel good inside... will regulate your digestive system - until several years down the line when you will start to feel very, very bad indeed.