publishing work anonymously

Is there a robust way to publish work anonymously? IE, publish the work and never worry about being forced to reveal yourself as the author due to some possible dispute?

Using a very unrestrictive license like MIT or WTFPL with a pseudonym seems to be good. Even if someone else claims to be the person behind the pseudonym, that person couldn't restrict your use of the software, due to the loose license. So there wouldn't even be a need dispute their claim. Or maybe I'm missing something here. Anyways, advice would be appreciated.

Just post the code somewhere with a notice on the top of the code files:
This code was published anonymously into the public domain. Do with it as you wish.

When I share my small bug fixes and small improvements to free software, I usually contact the project maintainers and tell them that I'd like to anonymously share my small code into the public domain which means you can take ownership of it should you desire it.