It has some bad and disturbing stuff since people can post but the advanced filter system can keep you from seeing them. If you want fanfiction this is the best possible site.
Tip for consumers:
Make sure to be very careful reading tags on the site to make sure you don't encounter anything that upsets you.
From what's clear, pedophilia is acceptable and welcomed on that on Ao3. The site can be okay but a "blacklist" feature would make it much better.
Tip for consumers:
Don't go on here if you have standards.
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