Thanks for Submitting Your Résumé to This Black Hole
In my job search, I've been surprised by how often you submit a resume online, and then you don't even get a rejection email. It's a true "black hole" in that you never hear back, not even with a "no thanks". I think it's disrespectful of candidates to ask them to spend time filling out an application, and then leave them hanging because you're (presumably) too lazy to read it.