I'm saying that the reason warrant canaries haven't gotten companies in trouble yet is because they're so vague as to be practically useless and that revealing to a person that they were the target of an NSL, through either action or inaction, would probably be over the line legally.

At the very least it'd be a massively expensive test case and the companies that have the money to pay for that have too much to lose on a case that isn't solid. It'll come down to the very technical legal question of action vs inaction that would probably wind up in the supreme court.