https://www.reddit.com/settings/data-request
Having worked at a company that had a massive influx of GDPR requests we weren’t prepared for, this one could actually cause them some trouble if Reddit don’t have that process properly automated.
I mean clearly the best choice for the mods is to comply with removing the nsfw tag but tell their communities that they are not going to be moderating nsfw posts, so please post maximum porn.
Tell Reddit with that action that they can make all the rules they want but it's not going to get the mods to actually follow them.