[mjlawson]

You are technically correct. The best kind of correct! In practical terms, it depends on the license used. Since most licenses used in open source will prevent you from making these kind of requests, this consequence isn't likely to have any practical implications.

[kd5bjo]

You are assuming that the true rights holders of all the code in the package actually agreed to the given license. Someone unrelated to the package development can still claim it includes an illegally-copied, unlicensed version of their code.