Here's my idea:
The SCP is an anomalous Garfield strip. When a person consciously reads it, they begin to eat everything around them, edible or inedible. The effect wears off around an hour, but most of the afflicted die before then, usually due to overeating.
The Foundation intially discovered the SCP after reports of mass deaths in a small town, all of similar nature to what was stated above. I also plan to add test logs so the Foundation can test how far its effect goes.