I understand that Apple is not developing these apps, but they are entangled in these apps due to their involvement in "approving" these apps, distributing these apps using their servers, and also by making money off their sale. Therefore, Apple should take more responsibility for the app's content and consequences. If they don't want to take the heat, then they should remove themselves from the app approving/distributing business.
So Apple et. all are being sued for doing what Google tries to do (in a different way) every millisecond of everyday...?
It's not a secret what Google does. It's one of their well-known practices. It's actually how every advertising firm survives - by marketing to the appropriate demographic. That said, if you don't like this, you shouldn't use their services. Nor watch TV, read the newspaper, use a credit card, or use any frequent shopper cards, as all of these services are monitoring your behaviors and habits.