Earlier quoted context omitted.
Not just the networks (although preferably also the networks) but also the publishers. If a newspaper took money to advertise blatant, obvious scams, I assume a judge would consider them at least partially responsible for restitution, if not an accessory to the crime. Looking away really hard (and delegating the task of looking away really hard) shouldn't get you out of this. Hold the publisher responsible, they can…
This kind of thing has come up before with "murder for hire" advertisements [1]. The publishers were only found liable when the advertisement was very explicit. Seems like the bar is quite high and courts are currently unwilling to impose "undue burden" on publishers. 1. https://en.wikipedia.org/wiki/Soldier_of_Fortune_(magazine)#...
If you have to buy a newspaper to publish your info, that is quite a high bar.
At the same time, none of us* want malware scum to use newspaper ads to fleece people.
*OK, some of us write malware scum. I don't count their opinions as valid.