But I have a confession to make. I used to be one of the students you commiserate about on this site. When I did make it to class at all, I generally fell asleep. I was typically wearing pajama pants and had a generally disheveled appearance. I cheated when I thought I could get away with it and never once had to face the music. Whether or not this was due to instructors not noticing or not wanting to deal with it I'll never know.
Part of my problem was that I couldn't see beyond my own nose in terms of what value any of the material I was being offered might have. To me, schooling was compulsory and I was just going through the motions and waiting for it to be over so my life could finally start. I think this is the case with many of students referenced here.
And to the professors who didn't give up on me even when I routinely disappointed them, and the professors who aided and encouraged me through my transformation: thank you.