We can always wonder what might have been. We can also get out there ourselves. If he were after that kind of drama, he might have. He left arrest to future artist/activists like Ai Weiwei. Duchamp was a kind of art activist but I don't think he was interested in risking arrest or did much that would lead to that kind of result. Duchamp's cynicism, if we want to call it that, was directed at contemporaneous art institutions, and didn't require or even suggest illegal activities. His cynicism didn't manifest as opportunism.