Do Not Fail My Class

For my small class (the one with 35 students, as opposed to the one with 200 students), I have decided that every time a student is absent or doesn't turn in work, I am going to email the student asking, basically, wtf?

After a student gets two emails from me about not coming to class and not doing the work, I think I'm going to escalate to phone calls.

I'm hoping that the hardcore slackers will find this annoying and will drop while it is still add-drop.