Following the earlier example of Xitter, there are loads of accounts that are obvious bots or foreign propaganda outfits to anybody who's been using the site for a while, complete with a reasonably good litmus test: whenever you suspect a post is from one of these, check the posting account's location. For me the accounts that raise internal red flags are almost always posting from SE Asia, somewhere in Africa, Russia, etc.

That means their content and profile quirks follow clear patterns that are not that difficult to distinguish. Xitter just has no financial or legal incentive to do so.

> I don't really get you point about removing surveillance style ad tech. Wouldn't that just make it even harder to detect foreign influence accounts?

The difference is the invasiveness of the data gathered and who it's given to. For bot/troll/propaganda mitigation, invasiveness is comparably minimal (survelliance advertising isolates marketable qualities such as race, orientation, religion, marital status, purchasing habits, etc; none of these are necessary for mitigation) and gathered data never needs to leave the possession of the social network.