A surveillance camera could also prove that you were peaceful if you are caught up in a bad situation if you can be identified.
Just to be clear, you think you’re allowed to protest, but also think that you may have to prove your innocence, rather than having your guilt be proven?
It sounds like you actually realize that you’re more at the whims of the government than your claims about being free let on.
“I am going to alter my actions in order to ensure that I am as safe from false accusation as I can be” is just self-censorship because you actually do fear your government.
I get what you are saying, and no, I don’t believe you should have to prove yourself innocent.
I simply ment it as if I happened to be part of a mass arrest by accident and can be identified as having done nothing, I would be let go with an apology.