I'm trying to think of practical use cases for this. Is surveillance one of them? Could you drop a bunch of these marked tardigrades on an object or on money an

I'm trying to think of practical use cases for this. Is surveillance one of them? Could you drop a bunch of these marked tardigrades on an object or on money and later identify it? Doesn't seem like a very efficient way to accomplish the goal, but it would make for a great plot line in a spy movie.