PSA: if you're talking about doing actual political violence on social media in public, you are a dangerously ignorant twerp who lacks the situational awareness required to do anything useful for anyone.
well, speaking as someone who used to report in a dictatorship on how activists were using the internet and has talked to a lot of people who were jailed for online speech, i can assure you that even fascist regimes usually pick and choose targets, and it's good to avoid being one.
It will certainly keep your comms safe, but if the softest, most orderly thing you can organize thru secure opsec is going to be met by riot cops -- with the robust support of the gov't and press -- we still have a problem.
At least it's easy to remember sound cannons can't penetrate umbrellas.