I really really doubt that this is going to have any effect at all. Although many are septic of the attribution of "actual cyber attacks", I doubt that that skepticism can be stretched to include the disinformation/fud spread by the West or Russia.
That is to say (although it might not be the case now) that these websites/accounts are not dependent on ads for funding or growing their audience. This might cut down on lazy journalism (or churnalism as it's called) but as soon as the free proxies for the disinformation dry up, a couple of 'funded-behind-the-scenes' will take their place.
As for stopping the growth of the respective perpetrators audiences, likely also ineffective. There's a bunch of alternative platforms that lend themselves very well to fud spreading, twitter or a google search come to mind. Ultimately people, once converted, want to read and talk about the latest and greatest evil of <target>. No need to take out ads, your friends will want to tell you.
That is to say (although it might not be the case now) that these websites/accounts are not dependent on ads for funding or growing their audience. This might cut down on lazy journalism (or churnalism as it's called) but as soon as the free proxies for the disinformation dry up, a couple of 'funded-behind-the-scenes' will take their place.
As for stopping the growth of the respective perpetrators audiences, likely also ineffective. There's a bunch of alternative platforms that lend themselves very well to fud spreading, twitter or a google search come to mind. Ultimately people, once converted, want to read and talk about the latest and greatest evil of <target>. No need to take out ads, your friends will want to tell you.