Running a consumer site that has plenty of user generated outgoing links but doesn’t give any exposure to new accounts I’ve seen a lot of different spam tactics

Running a consumer site that has plenty of user generated outgoing links but doesn’t give any exposure to new accounts I’ve seen a lot of different spam tactics as well. The one thing that has worked reliably is building a repository of bad IPs or potentially domains that are doing the spamming and blocking those. I wonder if a central repository of bad actors with this type of activity can be made for multiple UGC platforms to share. Wouldn’t be surprised if Akismet and other spam blockers already surface those. Bonus points if each entry provides details on the kind of attack vector used by each spammer and the sites who add to the list are also vetted/penalized for bad entries. Plus entries have a way of appealing if needed. Multiple layers of accountability built in. Unique ids won work - too dangerous and likely to be abused by advertisers or centralized entities trying to track individuals.