Because if Putin drafts from Moscow, he’ll fall out a window real fucking fast

Criminals in general are stupid. They tend to lack impulse control.

The actual smart ones don’t get caught or steal legally.

How can a web of trust prevent Joe-bob from claiming bullshit like in the OP?

This is something AI would be good for

Have it search for specific misinformation and reply with a canned response with sources using an official account.