You could gather a bunch of anons on some hard to track website then mail bricks and letters to them. Every envelope has to be opened. The content can be the u

You could gather a bunch of anons on some hard to track website then mail bricks and letters to them. Every envelope has to be opened. The content can be the usual wordy mess and be made to look a lot like the official kind of mail they receive so that it all has to be kept and sorted to make sure nothing important is skipped.