Because then you could bypass them for each subsequent The Oatmeal comic by just going to The Oatmeal.

I'm wondering why someone hasn't done a tineye-dmca-sending mashup to help control these issues..

An example search from tineye of oatmeal images (almost two pages worth): http://www.tineye.com/search/657460f93292f13484a028f4828b838...