having a bunch of articles with straight up gore and sexual harassment in them not tagged as being 18+ is…
yeah. not good.
On that, at least, we are in agreement.
But having two different strata of users (16-17 and 18+) who are - at least in theory - supposed to interact with content differently seems bad.
One way to resolve this is by raising the site age to 18+. However, this thread is based on the assumption we will be doing the opposite of that, so that's not an option.
Another way is to say "16 year-olds are mature enough to be site members, therefore they are old enough to read sexual harassment and gore" and just knock the age warning stuff down to 16+. Non-members below that age would still be able to click through the warning, but non-members are outside of site jurisdiction by definition. There's probably a bunch of legal issues, but I am not a lawyer and anyway we were told to ignore legal questions in the initial thread.
Yet another option is to make it so that any user known to be under 18 who comments on an adult article gets a warning, with escalating consequences for subsequent comments. This option would be a lot of work for staff and probably alienate a bunch of people, but it does avoid the problem of "you must be 18 (wink, wink)" that the status quo has.
Neither are particularly appealing options, but since, for purposes of this thread, we are assuming that the age limit will be lowered back down to 16+, they are the only two I can think of. Definitely open to other suggestions, though.
e: Also, as for "the status quo allows/allowed this," there is a significant difference. First, the current status quo was to bump up the age to 18+, which gets rid of the problem of "users under the age of 18 are interacting with articles intended for mature adults." Since it appears that it is being reversed, that's again not an option.
The prior status quo - "we have 18+ articles and a memberbase that includes people under that age limit, but it's fine whatever" - was bad and also the result of multiple decisions made in isolation. It was defensible only insofar as it wasn't seriously examined at the time.
If we are going to change site policy to (re-) allow underaged users, it is absolutely the responsibility of those who have pushed for this policy change to also address this new issue that will arise as a result of their preferred policy outcome.
ee: Another possibility that was raised in 05 was deleting/relocating all NSFW/18+ content. Doing that unilaterally seems like an incredibly bad idea and one that I strongly advise against. It's hard to read it as anything beyond a huge "fuck you" to people who wrote for the site in good faith. This goes double for people who took it upon themselves to label their work as adult even when lacking sexual elements (I don't have statistics on how many authors chose to do this, but I assume MAST does).
Deleting stuff is a terrible idea. Don't do it.