For example, looking at mastodon.social and starting at the top.

We do have a healthy sex & erotica community.

If we include them on me.dm, then one rule we could add is that they need to cw their posts?

Ok, we're adults. We know how to scroll past that if, for example, we are at work.

This, btw, is our current Rules as applied to Medium.com.
https://policy.medium.com/medium-rules-30e5502c4eb4

And this addendum for controversial, suspect and extreme content is pretty illuminating.
https://help.medium.com/hc/en-us/articles/360018182453-Controversial-Suspect-and-Extreme-Content

Remember, I'm on a learning curve too. So if someone complains directly to me about how these rules have been enforced against them, I generally do look into it.

The people I've looked into have fallen into two camps:

A) Swear that hating on trans people is done out of love.

B) Are anti vax and citing a news story on the website of their local TV news channel as conclusive evidence.

I'm sure we apply the other rules on a day to day basis, but I don't end up hearing about them.

More on figuring out moderation changes between medium.com and me.dm...

Yes to content warning on graphic and adult topics. We should make that a server rule because our main thing will be onboarding mastodon newbies. So the visibility of a rule will help teach a core concept here.

But what about more edge case warnings? Someone suggested on images of food out of sensitivity to people with eating disorders.

That's definitely outside of the level of sensitivity that we currently ask for on Medium.com.

It brings up two questions. One is whether this is a mainstream level of CW? Do most servers put CW on this?

Then two, there must be many other sensitive topics of similar severity and occurrence. What are they? What about lesser sensitivities?