I used o marathon anime back in high school. Failed a couple of classes as a result. It was not not intentional but when a series is really good. I cant wait to see what happens next and i end up staying up all night or skipping classes to get home early if got forbid i stopped at a cliffhanger. If a current series is boring me i would let i pile up so i can watch all at once. Buta s i got older it became more difficult to maathon anine. To the point even if i have free time its difficult to watch more than a few eps. Sometimes however if i knowa series is reallu good or will hve lots of sad momments i become too afraid to continue watching.
A special case was fma brotherhood wich i decided was too awesime to watch all at once