@ZetaSigrid
It's allowed if you are 18.

@ZetaSigrid As far as I know, Mastodon is not exactly a site. It's more of a program that sits on a server and after customization it becomes an instance. To join Mastodon you join an instance. You chose Game Liberty Club.
So, my point is that rules are relevant to your instance. When posting on all instances (Federated Timeline) then it's best practice to use NSFW and make pics invisible by default.