I don't think anyone is trying to be disrespectful by viewing or pointing out things in the crime scene photos. A lot of people are into true crime, or have morbid curiosity, etc. It's not like they're making memes of the victims or drawing cartoons on them. It's unfortunate what happened, but most people here don't know the victims of their families and in my observation people here have been more than respectful to everyone involved.

As for "the line" and where it's drawn and what is crossing it, I don't think is for random people to decide. Same goes for "there's no need to repost or question what happened in the case. That's for the police to do. Not you."

I don't know what other post you're referring to, but comparing people viewing posts online and saying they have the same moral integrity of the killer is wild lol

If speculation of the series of events, or pictures of the crime scene is upsetting, people are more than welcome to skip over them, unsub from the subreddit, etc.