When it happens to you, you can see how you react. I sure remember having your stance at one point, in the abstract. My personal use of license is reactionary to the situations I've experienced.
I never really looked into the GPL before, their stance on military use includes freedom of usage for institutions whose purpose is surveillance and warfare, my gut feeling is that they might not have asked themselves freedom for whom? the missile manufacturer? I'm not sure that this sounds like freedom.
I'll say this right out, I'll bounce out of open source if I ever see my code used for military purposes. I'll keep releasing works under the MIT until I can no longer in good conscience do so.
Thanks for the clarity, I think I have a more consistent view of your ethics now.
I'm not sure if it's cultural, but in the US there's a strong sentiment for freedom of speech. Freedom of speech is most important not when people are saying things that one agrees with, but when they are saying things for which one disagrees.
The FSF's stance on software freedom is almost surely well thought out and deeply ideological. On one hand, it means that for every bad case scenario, the freedom allows the option for other good case scenarios. On the other hand, it identifies how difficult and fickle it is to enforce a purity test for usage and that any organization involved in such a decision is bound to be corrupted.
Note that MIT is one of the more permissive libre/free licenses, allowing for commercial re-use without a copyleft component, network usage without providing source or patent exemption. At the very least, you might want to consider GPL or AGPL as they might help some of the bad use cases you're trying to guard against.
Crockford's license seems like a good alternative in this case! https://news.ycombinator.com/item?id=4762107