I had a student who routinely missed classes. He actually missed so many that I thought he dropped... but he comes waltzing in during the fourth week of the class "Oh, sorry, I was at my cousin's wedding in Hawaii for two weeks".
Um, yeah, you couldn't have told me about that BEFORE you left?
So I warned him that he needed to come regularly for the rest of the quarter to have the chance to pass it. He still shows up irregularly, often comes in inappropriate clothes (it was an equine halter breaking course, came in flip flops), and complaining about ADHD. "I caaaan't work with my horse today... I have ADHD. It's too haaaard".
At the end of the quarter, I get a 2 page e-mail from above student. "Oh, I just wanted to tell you how much I loved your class, and how much I learned. Oh, and I have a horse, and he's amazing and I did all his training. Oh, and I need AT LEAST a B in this class, but an A would be great, too!!"
My reply: "Don't worry, you will get the grade that you deserve"
So I failed him... only student I ever had to fail.
Edited to correct grammar