Enforceability of individual licenses is a deeply complex topic that lay-people such as myself are unlikely to be able to comment on in any meaningful way.
As a result, I believe that until the ethical source movement has enough funding (or pro-bono volunteer hours available) we should not worry too much about enforceability as we draft and discuss mechanisms for licensing.
Yet, while I do not believe mandating enforceability in these early drafts is a reasonable constraint; I do think it's something we want to learn more about so that future versions of ethical licenses, bylaws, operating agreements, terms of use, and other legal documents are likely to be more resilient in the event of a challenge in court.
That said, I am curious if the broader ethical source and open source community believes we should prioritize enforcement at such an early stage?