One might say all the major changes muted was just a load of twaddle.
All the stages are alive for 2025.
https://szigetfestival.com/en/exciting-venues-of-sziget
Oh, I haven't got a clue with the original specific case that was originally brought up. He might have done something illegal, who knows? I agree with the OP that the evidence sounds thin on the ground based on the BBC article (but none of us know the full story).
But your term "overstepping the freedoms we enjoy" is so elastic, it could mean anything to anyone.
To be honest, I think you can put the issue of recording in a public place aside completely. I think it should be allowed. Full stop (for self protection as much as anything). It's the other things such as harassment, up skirting, bullying, etc, that's the problem.
If someone is doing something dodgy and they record it, that's just potential evidence against them. I don't think the recording itself should be illegal at all in a public place. Doesn't that solve everything?