Is nobody responsible for the content of ads? If nytimes.com started displaying NSFW ads for porn sites, or (hypothetically) grisly death videos chosen by a hig

Is nobody responsible for the content of ads? If nytimes.com started displaying NSFW ads for porn sites, or (hypothetically) grisly death videos chosen by a high bidder that just wants to watch the world burn, they would likely be penalized for running afoul of FCC regulations. Or, let's say a domestic buyer purchases ads that engage in libelous allegations. There are legal channels with which to pursue retractions and damages from the buyer. The difference now is that a foreign party is the party that would otherwise be held responsible. Not very effective to sue the ad buyer in this case. So shouldn't the media platform be responsible for either the content, or at least for knowing their customer?