[nobody9999]

>Perhaps useless in the sense that those who need them the most will either refuse to use them or misuse them.

I'd argue that such tools are valuable to everyone, even those who have no interest in verifying the credibility or veracity of information sources.

As the old saw goes, "you can lead a horse to water, but you can't make him drink." Or both more snarkily and (IMHO) more accurately, "you can lead a fool to knowledge, but you can't make him think."

>Going further... I think it might be fair to say that those tools just don't scale.

I'm not sure what your mean by "scale" in this context.

Determining for oneself the credibility/veracity of information or an information source is (and should be, IMHO) inherently an individual pursuit.