The currently active Crazy Cosmetics and Crazy Cosmetics III missions fit into the ridiculous category mentioned by titus. These are the ones that involve capturing approx 30 high-quality photos of a well-known makeup brand from different angles and in quadrants and answering more than two dozen questions. I accepted and completed one of each, but will not do these missions again.
One problem I encountered is you are in the cosmetics section for a long time taking many photos and there are security cameras in each aisle capturing your activity. When I attempted the missions during daytime hours, I was approached by a dept manager who asked what I was doing. Even though I was able to convince her that I was working on a school-related project, she stayed near and kept a close watch on me. I returned late that night after work and was able to do the second mission without interference. The pay is $8 per mission. IMHO, not worth the stress and time investment.
Side note: The other two missions involving a hair color brand are more do-able and there aren't any security cameras placed in the hair color aisle, at least not in stores in my area. The pay is the same, $8. (I believe they are called Crazy Cosmetics II and Crazy Cosmetics IV.)
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