> this seems very gimmicky in front of a judge.
It's always felt like engineers thinking they're outsmarting a much more mature legal system with humans built-in to slap away foolish gotchas.
The EFF seems to think warrant canaries would work, though, but under the premise that you can say "I've received some number of national security letters", just not "I've received this precise number of NSLs." That's an _entirely_ different line of thinking than every advocation of warrant canaries I've read.