How does one get marked?
With a Sharpie?
Tattoo needles?
Cat claws?
Particularly happy bed mate?
Walking into doors or getting into fights?
Stealing bank money with dye tags?
Stubbing a toe really hard?
Having parents who were fond of the name Mark?
Doing something else to offend/annoy the teacher after your name is already on the board? (frequent personal experience)
Which one did you have in mind?
AuldSoul