I do think that at Forums, there could be TWO streams of discussion going on.
Perhaps a lot of the angst and "handbag fights"

arises from these two distinct lines of discussion being intermingled.
On the one hand many people are posting what they think, guess, imagine. Bringing their own experiences and prejudices into it and overlaying that on the actual facts of the case. Often they have only scant knowledge of the facts, or even what are facts and what are just unsubstantiated rumours. In that context, we all tend to employ resolution of Cognitive Dissonance by mentally emphasising anything that supports our position, and down-playing facts that contradict. That is normal human nature, the way we lessen potential mental turmoil
On the other hand, we ARE posting about a trial, a legal process, where Jurors (for instance) are instructed to consider matters quite differently from the way they do in day-to-day life. They are instructed to view all the evidence presented, but EXCLUDE things not presented in Court. To NOT bring there own prejudices into their deliberations. To disregard personal feelings about the defendant, the lawyers on either side, and sympathy for victims and family etc. This "Legal Approach" is the other basic type of discussion seen at forums. It needs to be quite dispassionate, and that is what probably leads to the accusations of "victim bashing". You CAN NOT arbitrarily decree someone to be a "victim" from the outset and then suppress any negative facts about that person. Details of the so called victim can be an important part of the overall picture.
Obviously a lot of people posting online want to discuss cases in the first fashion hence
"True Gossip Forums"But IMO it is more interesting to discuss cases from a more legal/evidence based stand point
"True Crime Forums"
Where you have Forums that profess to be "True Crime", but are in fact mostly "True Gossip" you can end up what is best described as a
"True Daft Forum". And that is what you actually find (at least in part) at MOST Forums. It gets particularly funny when you have the odd poster who tries to introduce "True Crime" discussion into a "True Gossip" Forum.... it results in "
True Handbag Fights" 
I am HAPPY to do a bit of "Gossip" stuff.... but with a Trial underway I think the "Legal Approach" is the most interesting. It's not until the Trial is underway that we get to see the actual evidence in most jurisdictions. Florida is a bit of an exception with "Sunshine Law" and "Discovery" released publicly so open for some sort of Legal analysis well ahead of the trial. But even then, Discovery info may not be used at Trial, or even be admissible.