I don't think people understand what "innocent until proven guilty" means.
I keep seeing people online who think this phrase - which is purely a legal mechanism - means that anyone who has not been convicted actually IS innocent and that everyone is supposed to just go along with it.
"Presumption of Innocence" is a legal mechanism created to ensure defendants' the right to a fair trial. This legal mechanism has been changed several times, differs from country to country, and there are specific circumstances in which the court system has the power to overrule presumption of innocence and treat a defendant as being guilty without having been found guilty (mostly in clauses contained in anti-terrorism legislation created post 9/11).
"Innocent until proven guilty" has absolutely no bearing outside of a court of law. None of us work for CPS and none of us are jurors, so it simply does not apply.
The idea that Presumption of Innocence means that the general public is legally or morally obligated to act as though someone is innocent is not based on any kind of legal fact and is based on sheer ignorance of the legal system.
Besides, use basic logic for a second. The entire legal system could not exist if everyone had to operate under the assumption everyone is innocent unless convicted. How are police detectives supposed to interrogate suspects, if they have to presume and act as though those suspects are innocent? The entire point of CPS is to assume that suspects are guilty. The entire job of a prosecutor is to tell the jury in the most convincing way possible that the defendant - who obviously has not yet been found guilty - IS guilty. Have you ever seen a criminal trial? The prosecutors will outright say "This man is GUILTY and you must bring back a guilty verdict."
Not to mention, there are many situations, for example those surrounding safeguarding, where people are legally obligated to NOT act as though someone is innocent. If you are the head teacher of a secondary school and multiple pupils have come forward alleging that a teacher raped them, and the police are currently investigating him, then according to safeguarding laws you have to suspend that person until they have been cleared. You certainly cannot say "well innocent until proven guilty!"
And all those situations are actual legal situations. This is just chatting on a message board. It's 100% legal to form, and state, an opinion on someone's guilt. Innocent until proven guilty has nothing to do with the general public or our free speech right to state opinions.