I'm getting the same problem again... I'm getting a ton of junk traffic from various .ru sites, but also some .com that are totally irrelevant, rather spam sites.
I would like to block all traffic from those sites.
I don't know if that can be done by blocking the IPs where they're hosted - because they could simply use proxies, modify IP later.
I will anyway disavow them, but this may not be enough - even though I haven't found any links on them to me...
Any better advice?