Which of the 12K arrests do you not agree with? Or are you saying people should be free to write whatever they want on social media with no repercussions?
This isn't a "freespeach" argument, this is the actual text of the actual constitution. This is the actual literal reason that line is included in the bill of rights. It is explicit constitutional law that the government cannot punish you for criticizing the government.
There are a ton of exceptions to our right to free speech, but this is not one.
no repercussions from the government, yes, people should be free to write whatever they want
12K is just a ridiculous number and indicates that the UK indeed has a free speech problem. I don't think that in my country there were more like ~ 20 actual arrests over the same problem during the same period.
Even if you agree with prosecuting people for speech, why exactly would you arrest them and drag them to prison/jail? Even here in Europe, this is a sort of offense that usually results in a suspended sentence or a fine, and a physical arrest is absolutely unnecessary, unless there is a good suspicion that that person is going to harm some concrete people at a concrete time.
In a more liberal country, even if prosecution over an utterance takes place, it usually happens without arrests, simply by asking the culprit to come to a police station and explain themselves, later the same in front of a court. There just isn't any need for physical restraining of that person, it is just intimidation.
I think a lot of people assume by default that other European countries have fewer (or less egregious) arrests for social media posts just because the American right isn't boosting the relevant stories. But if you Google, you'll find some pretty wild instances of arrests for social media posts in lots of other European countries. Here are some examples.
In Spain you can be arrested for insulting the King: https://en.wikipedia.org/wiki/Pablo_Has%C3%A9l [No, he didn't just insult the King, but that is one of the crimes he was charged with.]
In Germany you can be arrested for being rude about civil servants: https://www.aa.com.tr/en/europe/german-police-raid-home-of-s...
In France, you can be convicted (not just arrested) for posting a non-doctored photo that makes some policemen look bad: https://www.amnesty.ie/france-criminal-conviction-for-a-twee...
In the Czech Republic, you can be convicted for making rude posts about Ukranians: https://www.newsendip.com/in-czech-republic-two-men-guilty-o... And if you're a communist, that's too bad, because it's illegal to express support for communist ideology (on social media or anywhere else).
In Italy, you can be fined for mocking the President's height: https://www.reuters.com/world/europe/italian-journalist-orde...
All of these (with the exception of some of the non-King-related charges in the Spanish case) are pretty clearly instances where someone would not be arrested – and would certainly not be convicted – in the UK. But you won't find out about these cases from Elon Musk's X feed. And of course, people do get arrested and jailed for social media posts even in the land of the free, from time to time:
https://edition.cnn.com/2025/12/17/politics/retired-cop-jail...
See also this article for some more context on the '12K' claim: https://www.standard.co.uk/news/tommy-robinson-uk-speech-cla...