As long as they had to be honest with me as to who they post as, I'd stop them easily in a matter of minutes tops.
They can only do what they do because they are able to hide their posting identities and keep them separated from their real names and everyday lives,
either that or find the one controlling them and just kick it's head in, then about 1000 trolls and disinformationists would simply not be posting anymore and instead would be wondering what they have been doing for the last whatever amount of years they have been used to post the opinions of some blob with no brain.