Unique online social experiment ideas?

[Jessie]

For a social science class in school we have to do a primary research experiment. Some past examples have included somebody testing bystander response in my high school by pretending to drop their books and seeing how many people actually stopped to help, offering free jelly beans in the main lobby to see which colour gets picked the most, or doing something along the lines of racism by showing mugshots of people and asking various questions to the students.
Any cool ideas on a social experiment I could do? I like topics like perception of beauty, pop culture, prejudice, media, and I like the idea of doing some kind of ChatRoulette experiment or a Youtube experiment.
Any suggestions? 10 points for best answer. I can't think of anything original enough