Still impersonation sucks, and it happens. Thankfully we can solve this with cryptography without trying to beg the legal system of hundreds of countries to agree on enforcement tactics.

I publish 100% of code I write as FOSS. I also sign my commits. If the code shows up later without attribution to me, I would prove it publicly to call out dishonest behavior.

I would also never use legal action for this though. All information should be free. I only put FOSS licenses on code to ensure I do not get sued and so corporations bound by such silly rules have a difficult time using my work in private codebases without paying me for an alternate license.

I would abolish all IP law if I could. Let all information be free without legal risk to authors or those that share it.