This is a long-term request for some distance future. It would be great to have clothing and attachments certified to meet some theme or time period. For example, we have a medieval experience, yet avatars come in wearing spacesuits and laser guns.
It would be great if we could restrict the visiting avatars to only items for the theme. And if the avatar doesn't have any clothing for the theme, they can receive loaner clothing from the experience while there.
This would require some theme flags that could be added to inventory items. For certification, maybe a service by Linden. Or maybe some sort of counter where others can click the avatar and flag the item as not be according to the theme??