The problem is that it isn't true, you can say things that they agree with without being banned, but say anything even slightly leftish and it's insta-ban.
yes, it is well known. I just see it as a digital versin of the phone book.
And there are even more extreme versions, like ratsit.se
where you can pay to get credit information on anyone.
Personally I think that what ratsit does is probably too far, and maybe it shouldn't be legal.
But in general I like our "public information" system, that lots of government information is available to every citizen, I find the benefits of being able to check what the government and those with power does (journalism would be way harder without this), outweights the negatives.
If you are rich enough you can pick what country gets to tax you, if one country raises the tax too much, rich people will just move their taxable assets to another country.
It is super difficult to actually do that when tax laws are national but corporations are global.
When a corporation is large enough to be able to move around in the world they can start shopping around for the most advantageous place to set up shop.
But how would one actually know if a result is a false positive or not?
Sure, in extreme cases it might be obvious, but if you just know that one test gives more matches than another, not knowing which one is the one giving false results?