@aeva @mrcopilot Less contrived:
Clueless dev taking some GPL code and putting it under a non-reciprocal license probably happens fairly often. I seem to recall some cases where this has been discovered and the non-reciprocally-licensed project had to make effort to remove the GPL'ed parts.
Not due to court action though, just some clued-in person in the project doing some pre-emptive action to keep the project in the clear.