OpenSim has a rating problem in general. In my opinion, the Second Life rating system doesn't work nearly as reliably in OpenSim as in Second Life.
For one, there's no consent on what which rating means. There are different definitions, but everybody believes that THEIR definition is either the only one at all or the only right one.
Some say that everybody knows that the ratings in OpenSim are exactly the same as in Second Life.
Others say that everybody knows that both General and Moderate mean G-rated, and Adult means G-rated, too, but no child avatars allowed.
As they all claim that their definition is universal, hardly anyone can be bothered to write them down for others to read and follow. The only OpenSim grid I know that has rating definitions written down is DigiWorldz, but even their definition can be stretched by sim owners as far as they want to.
And then there are people who don't come from English-speaking countries and who don't live and breathe especially U.S. culture. For an American, "adult" means "smut". But if you're a foreign speaker, you've either learned in school that "adult" means "grown-up", or you have to run English through an online translator which translates "adult" into whatever "grown-up" is in your language. OSW has a lot of users who don't understand English, who run the entire website through Google Translate, and who seem to have forgotten over time that there's a translator running. That's another reason for rampant rating misuse and different ratings on OSW and in-world (e.g. OSW: Adult, in-world: General).
Not only doesn't OpenSim have mandatory rating definitions that all grids have to follow, it also doesn't have anyone who could enforce content ratings all over the Hypergrid. The individual grids can't seem to agree upon rating definitions, few grids actually have definitions in any form, even fewer write them down (only one did), and not a single one has definitions that can't be stretched to basically whatever a sim owner wants.
This leads to two extremes. One extreme is the use of the Adult rating as a child avatar repellent on otherwise 100% G-rated or maybe PG-rated sims because the sim owners "don't want no kiddies raisin' hell" on their land. You can get away with that even on DigiWorldz because you're free to restrict the liberties under the Adult rating as you please.
The other extreme are very liberal sims on very liberal, if not to say careless grids. You can build outright BDSM studios in plain public sight on General-rated sims and get away with it because the grid owners don't care. That is, grid owners can build on their own grids whatever they please because there's nobody who can stop them. They are their own Lindens with nobody higher up. They make their own rules, and they can just as well break them or not make any in the first place.
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