2 blacklists / blocklists containing only the domains for content filtering , which is currently missing since I didn't find anything while searching for it. Feel free to contribute
Make sure to download the list, and do a grep before contributing the domain. Furthermore, after downloading the list , do a
cat list.txt | sort -u > newlist.txt
To make sure that the domains are sorted and unique.
I'd go with refined-blacklist.txt which is hand checked, and that's the one you should contribute as well. In cae you want to go big, you can also use the joined blacklist.