Last fall, a Glendale-based business embarked on a mission to get attention for its cause. Hovering over the juncture of the I-17 and the I-10 stood a billboard's query in simple but gigantic script: "Are you as backed up as this traffic?" For PoopDoc.com's founder, Scott Olsen, it was an important question that required that clever directness. Olsen believes that eradicating constipation and cleansing the colon is the key to good health and disease prevention. Fair enough. Also, gross. What's grosser than gross, though? The unfortunate motorists whose only answer could be a miserable, "Yes!"