I came to this website just to get answers to some questions. I have created some popular cartoons. But some evil creators are creating naked and sexual images of my cartoon characters and posting on various pornographic websites. An artist is even selling them. I never expect such sexually explicit content of my characters. I want to remove these from all such websites. But the problem is I have seen that various websites are creating and promoting sexually explicit content of copyrighted and extremely popular characters from Disney, Warner Bros. They are even selling it for money on various sites like Patreon, Pixiv, Gumroad or taking donations from followers. Now, I can't do anything because I'm worried whether Disney, Warner Bros. are not taking any action against these things, or if taking action is of no use. What should I do now?
If the site has DMCA and copyright statements, such as patreon, Subscribestar, Steam, Itch, etc... you can file a copyright claim on any creator who is using your work without your authorization. The sites have certain requirements for you to show you own the copyright.
Now, what others have said has a kernal of truth... It's difficult for small time copyright owners to chase down and file claims.
Bigger companies like Disney and Nintendo do have attorneys file cease and desist orders along with copyright claims where they feel the person is making too much $$$ off their IP and/or damaging their brand.
For example:
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And:
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But they do perfom cost-benefit analyses to determine if time/effort/$$$ warrants action.
Now, sites like F95 and others of similar target audiences position themselves in a place of not having to worry about dealing with takedown notices. This is also why F95 has preferred file host sites used for uploading content... The file hosts they prefer are less likely to follow takedown notices, as well.
If you are genuinely interested in pursuing action against those violating your copyright, you should be reaching out to legal counsel who specializes in IP.... NOT asking randos on an adult game forum.