Someone acting really happy that they get to START a doodle chain.

A super-thin man begs you to help him find a cure.

A man with a block for a head has spilled onto his shirt.

Something about TF2 but it doesn't make sense. So here's what I propose: draw a flower.

Draw what you think your average D-O-D chain ruiner looks like. (Don't be too disgusting.)

A pony.

A rat stands next to a sign that says it's poor. (I'm feeling sad, so put a bunch of money in the Poor Rat's donation cup.)

A sad tooth stands atop a TV that has fallen over. The tooth explains that "it's not what I'd call 'living'.

A sad, almost pensive face.

Two of those baked snacks with the liquidized-fruit in the middle (name escapes me) have grown arms/legs/faces... and look unhappy.

A well-dressed alien with a single black eye on its forehead, two white eyes, and a vertical mouth.

A faceless man has a white overcoat. It doesn't hide that he has a green shirt on, underneath.