

Doing something that gets your org banned by a government that isn’t even the one you’re protesting seems not only ineffective but counterproductive to me.
Censorship laws in the UK are quite dystopian, but even in less authoritarian countries, this kind of action would result in serious consequences.
This is what inevitably happens when freedom of thought, speech and expression is limited for essentially any reason. Once the tools are in place, they will be used, abused and inevitably end up in the hands of someone you disagree with.