True, and it's been elaborated elsewhere that these have already been tested in the supreme court. But you have to admit that without that precedent, it does seem a little bit cheeky - "oh the law says I can't do X, well it doesn't say I can't simply not do inverse(X)" :)

For a funny / not funny example, see the attempts to ban analogs of illegal drugs. The whole research chemical thing is a result of the need to legislate exactly what’s illegal.

It's true, warrant canaries are not as implausible as sovcit arguments.

Sure, but warrant canaries sound like sovereign citizen stuff.

Supreme Court decisions can sound like sovcit stuff when they reference English common law, the Magna Carta, etc. Warrant canaries are just intended to exploit a technicality. There are a lot of technicalities in law that authoritarians don't like.