These are forums with millions of members on mainstream sites such as Reddit, Discord and 4chan. These are men writing about their wives, their mums, their mate’s daughter, exchanging images, sharing women’s names, socials and contact details, and no one – not one man – is calling them out. They’re patting each other on the back.
I suspect there is some amount of survivorship bias type thing going on here. The type of men to hang out in such places are the type that enjoy it, and as such would never call out such behavior. The men that don't enjoy such will tend not to come across such content in the first place.
So the first group just doesn't care, the second doesn’t see it in the first place.
There is also probably some degree of the second group of men acknowledging that trying to call out such behavior won't go very far. If you said "hey don't share this woman's pics" on 4chan, you're going to immediately get laughed at, ignored, and probably called a bunch of slurs. And then they'll keep on doing it because you told them not to. And that's in no small part because these places are puedo anonymous.
Men can't get away with such behavior as easily outside of the internet. Calling them out in real life is far more likely to go somewhere. However ther are caveats. Again comes the survivorship bias thing I mentioned. But worse, if done in real life and calling out that behavior backfires, it becomes a teaching moment. "Don't tell other men to behave decent or they'll ostracize and harass you".
It's a fucked up situation all around.