This comes down to a value judgement.
To some people (like you), online privacy is of immense value -- seemingly almost an inalienable right alongside, life, liberty, and pursuit of happiness.
To others, online privacy has little to no value.
I'm somewhere in the middle.
Don't you think services like this should be freely available for people who don't value online privacy like you do? It doesn't seem right to project your value system onto others when both can peacefully co-exist...
A logical solution that would protect both parties would regulate the transparency by which businesses must communicate these data sharing practices. I just don't see the logic around why any company who shares user data is automatically evil and worthy of assassination.