As propaganda, it's a beautiful judo move. I see nothing immoral about turning the force of eminent domain against one of those who "legitimized" its use for "public benefit."

As a practical matter, of COURSE it will never happen. I read yesterday where the local cops had dispatched cars to Souter's house as a "precaution" - to protect the house from protestors, of course. Normally in such cases, the cops are there for a different purpose indeed.

Philosophically, if I say I'm willing to shoot the bastards, with a rifle designed to be a tool of the state, why should I balk at using one of their laws against them?

Too much purity isn't necessarily a positive thing. Most of the worst things that ever happened in history were brought about in the name of philosophical purity.