What about the idea of adding a Tag to an instance?
Some worlds have a variety of uses, and may have different uses when it comes to party.
For example, if you need to gather avatars with elements such as furry or kemono, I would like to have a tag that informs people of the current properties of these instances, and a dedicated instance search to make it easier to find them.
Differences such as nsfw instances, sfw instances, and so on, or even more subtle differences, can be categorized by tag so that people can easily engage with their favorite tag instances.
I believe the age verification system might already be addressing this issue. If an instance is marked as 18+, users should expect NSFW content within that space. However, if there’s widespread confusion or misunderstanding around this, I can see the potential for clearer markings or tags to be added to instances, as you’ve suggested. If this becomes a common concern in the future, I would be open to supporting such measures to improve transparency and help users better navigate content in VRChat.
I’d like to take a more direct approach, so if you’d like to help, please head over to Age Verification Feedback | VRChat and submit your request there. A huge thank you to @Deantwo for helping guide this in the right direction!