This is being worked on. I was working with them to get global blacklist support integrated but there was some delays due to bugs with the native functionality. When it is fixed I believe it will get rolled out and I can provide some lists that can be subscribed to.

I always had a plan to provide global blacklist and global mutes that users can subscribe to for an unopinionated block for the spammiest content. However there were issues with the native feature and since it wasn't in high demand, it didn't get addressed until recently. Once it gets rolled out to all the nodes, I will re-evaluate providing lists.