To my poor point of view,they're usable only for statistical reasons,
for example,comparisons with already well-maintained blocklists and such...
Quite a bit of tedious task I would assume,not really sure if it would worth the effort.

Because it would end up again in manual inspection of the sites more or less...
Unless say that you find that an infected site there,
shares the same ip with other 200 sites from the same list...and then it goes on...
else,the chances of false positives is way too much compared to the benefits...
And it depends a bit on end-user needs,ie...if 5000 sites of the sites there are...porn,
then ok,someone can quickly block all all of these without ill effects for personal usage,lmao...