I agree with nexialys. Create a user group and you give access to those that ask to view.
As for the age limit....you have no way of knowing the age of anyone asking for access to it.
Peolple can say any age they want when contacing you.
The fact that they have to ask for access is sufficient evidence of concern as to content on your part.
A disclaimer or warning of content is a good idea.
Anyone not wanting to read crude or dirty jokes won't even ask for permission to view.
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