This is a great discussion that needs to happen. Thank you to the Admin and Moderators for leading this effort to improve Itch.io and make it a safe space. I'd like to suggest that perhaps there is a deeper underlying issue underneath. Before coming up with a content/age rating system maybe it would be good to clarify what content is allowed (even within the adult section). I elaborated on this topic on a recent post that suggested a change in the Terms of Service. I encourage you to check it out and take action. Thanks!