Unless you already knew the people involved or we have some third party sources, we are basically just believing the side that only has 1 goal; showing how guilty the people they prosecute are. How could that mean anything else but assuming guilt?
(And honestly I think that personal feelings towards a person are very often good enough to make a personal judgment on guilt, but we don't even have that here! I'd bet most of us never heard of them before today)
What is wrong is for media organizations (which can be as small as independent reporters) to break expected traditions w/o acknowledging it. It suggests that this case is different (and again, it might be different) implicitly, which isn't ethical. You should either work within the prevailing assumptions of the system, or explicitly defy them in a principled maner.
I don't think this is in practice true, as a matter of fact rather than an ideal. People don't, in general, behave the same with other people who are currently being prosecuted for a crime.
This certainly doesn't mean (most) people support vigilantism or witch hunts, or even that you assume guilt. However it seems clear the vast majority of people are fine with the idea that you might be "careful" with someone who is suspected of a crime, especially one being actively prosecuted. To the degree that many will claim they have a right to know this is happening, i.e. they will argue that news should be carried on this (although perhaps no editorializing). This absolutely is not the same as presumption of innocence.
Sometimes this is very unfair, obviously. But "the social contract" as it is practised seems to be pretty ok with that.
The question is where do you draw the line as an individual.
That's all it means. Obviously judges are not supposed to come into a case assuming you are guilty, but you can say that about any type of case. The phrase certainly doesn't mean we have to pretend that you are perfectly innocent up until the point of verdict.