The glaring oversight in your opinion is that all NSFW posts are clearly marked as NSFW, and desktop reddit along with all the mobile apps have settings requiring you to opt-in to view NSFW posts with further settings to actually display the image previews or hide them (default).

But not all NSFW content is porn. And turning on NSFW visibility is not the same thing as being subscribed to a porn sub.

Your whole argument is disingenuous and borders on concern trolling or pearl clutching. Reddit is full of porn and other NSFW images, so don't act like they're suddenly showing hard-core porn to a bunch of kids or something.

Okay, let's change the scenario a bit then. Let's say I magically know you have NSFW content turned on, on your Reddit account. We've never conversed.

I then, unprompted, start sending you links to hardcore pornographic images, in your DMs. Once every half hour or so.

Is that something you think would be totally fine? Do you seriously think I wouldn't be violating a lack of consent on your part? You've turned on visibility of NSFW posts, after all, you must be fine with seeing it!