No, only that we *always* warn for those particular ones, even if the author doesn't.
However, we let the authors warn for as much as they want. Some warn for small things, like AU, or EWE, others, content related such as HET, MPREG, and the like.
If you come across a story that is missing an 'extreme' content warning, just let us know. We try to catch them all, naturally.