Same!

Fanfiction.net had two purges of adult content, one in 2002, and one in 2012.

In the 2012 case fics we’re deleted and purged without notice or recourse.

They were just gone.

And that was a large part, a long with the purges going on on livejoural, of what led to the creation of AO3.

In late May, 2012, Fanfiction.net admins suddenly started deleting stories (together with their reviews and comments) they considered too mature to be on the site. Reports in ffdotnetrants on LiveJournal and the fanfiction.net M-Rated Story Purge forum say that a “swear word” in the title or summary of a gen story was enough to get a story deleted without warning.

Ffnet responded

Please note we would like to clarify the content policy we have in place since 2002. FanFiction.Net follows the Fiction Rating system ranging from Fiction K to Fiction M. Although Fiction Ratings goes up to Fiction MA, FanFiction.Net since 2002 has not allowed Fiction MA rated content which can contain adult/explicit content on the site. FanFiction.Net only accepts content in the Fiction K through Fiction M range. Fiction M can contain adult language, themes and suggestions. Detailed descriptions of physical interaction of sexual or violent nature is considered Fiction MA and has not been allowed on the site since 2002.

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