Y'know, the one 50 Shades of Grey is based on? It's definitely infamous enough, and bad enough. Supposedly it had been removed from the internet but I found it here

...But I've read exactly 0 Avatar fics. Does it pass the Google Test? (2 hits of people groaning about how bad it is on the first 2 pages of results over the past year, with the fic being 5 years old?) That said, the very idea of Zutara in a Korra setting is somewhat disturbing in itself.

Bleepfic, though? Ehhh... I mean, I could see classifying it as such, but the imagery is so over-the-top it was more a mild squick for me, which is kinda weird.