I've had a few new people ask me about my CWs, the best way to think of them is not as a mandatory tax for posting about nsfw topics (I know this is the inference circulating on Twitter) but as a tool you can use

You'll never agree with everyone about what should and shouldn't have a content warning, but inviting people *in* to serious topics or gross jokes or movie spoilers can let you talk to people who would otherwise be pushed *out* of conversation with you just by their own wants and needs