There's a good chance they won't figure it out, but the journey they go on is a lot of time worth it.
That's true of the good guys. Just make sure that you don't let the not so good guys spin their wheels in perpetuity, day after day on yet another problem. Or sometimes the same in different clothes. The good guy also probably told you earlier by pinging you for a quick 5 minute chat / call and was then back on his way.