That should be "considered innocent by the legal system". People are still free to come to their own conclusions--and act on them--even without a jury rendering a verdict.
Rather famously, for example, OJ Simpson was acquitted by a jury of murdering his wife. But most people these days would agree with the statement that he murdered his wife.
Which is what matters when determining sentences.
> People are still free to come to their own conclusions--and act on them
People are definitely not free to act on their conclusions. That's vigilantism, what the comment above was referring to.