Not to mention hijacking other accounts that would plausibly say things along the same lines as "proof" that the statement is real.

Even after dozens of high profile accounts were hacked many were still commenting that they didn't think it was possible for it to be a twitter vulnerability, but rather individual accounts being compromised or a 3rd party. If you only tweeted plausible things about war and corroborated it from multiple accounts at the same time you can reinforce things pretty easily.