When I first jumped into the fan fiction world, everybody was using the MPAA rating system to categorize their fiction, and nobody raised a fuss because it was all so new. But once it became clear that fan fiction was gaining legitimacy, and that sites like Fanfiction.net and others were turning an actual profit at it, the MPAA had something to say about that and we all had to scramble to come up with a new kind of rating system. So most sites now use the G-T-M-X system, which is what I’ve more or less used here. I don’t actually have any G fiction, and I haven’t “rated” any of the articles I wrote, but the rest follow the general rules used by most of the major fanfic sites these days.
Fiction with a “T” rating contains content similar to what you would expect to see in a movie that received a “PG-13” rating from the MPAA, a “12A” rating from the BBFC, or a “TV14” rating from the TV Parental Guidelines Monitoring Board. In essence, while the stories may contain content unsuitable for a child, any young adolescent ought to be able to handle them.
Fiction with an "M" rating contains content similar to what you would expect to see in a movie that received an "R" rating from the MPAA, a "15" or "18" rating from the BBFC, or a "TVM" rating from the TV Parental Guidelines Monitoring Board. In essence, older teens and adults can handle the material, but it is inappropriate for, and not intended for, younger readers.
Fiction with an "X" rating contains content similar to what you would expect to see in a movie that received either an "NC-17" rating or the older "X" rating from the MPAA, or an "R18" rating from the BBFC. There is no equivalent rating from the TV Parental Guidelines Monitoring Board, because similar content is not considered suitable for broadcast television. This is content intended for adults only.
While this content is unrated, I should probably warn you that I have a tendency to use salty language a lot of the time, so it might be a good idea to assume that it's all rated "T" even though it's nonfiction. (And this is part of why it's here under my pen name rather than published professionally under my real name.)