It's important to note that Twitter, tumblr etc could also read your dms. No matter what site you are on you should be cautious what you dm.
NOTE TO NEW USERS:
Mastodon's a cool place, but it's private like a local coffee shop, not a home bathroom.
Remember that the admin of your instance can see EVERYTHING you post, including direct posts. They can even disable 2 factor authentication, if you have it enabled (and you should. No really, enable that stuff now.)
Bottom line: Find an instance where you feel you can trust your admin, and don't send direct toots unless you trust the admin at the recipient's instance as well.
Okay so tumblr is banning rotating cubes saying it's porn and facebook banned saying "i'm gay" saying it's sexual solicitation and Twitter always seemed like it could disappear at any moment
I feel like we need to be getting ready for Mass Migration to Mastodon, which means we need to fix anything that keeps Mastodon from being usable, and there is in fact something that keeps Mastodon from being usable, there's one specific thing, it's this:
okay yeah so, this site is very welcoming to NSFW content and stuff, but please make sure that everything lewd is placed under a CW or at the very least, marked as sensitive with text like "lewd, NSFW, 18+" in the post so that people can know what's there! Also, if you notice porn that's not hidden properly, don't boost it!
Content Warnings are not for "offensive content" (although offensive content should be under a CW)
they are for people to consent to the consent to reading/interacting with more Serious or Harmful topics
it's not self-censorship. it's providing the subject matter to folks before they engage with the content so they can choose to interact or disengage based on their well-being and other things