This idea is inspired by this simple and yet brilliant idea (from CHI & Partners advertising agency) - Thebigask.com where people are invited to join a vertual march to show support for Friends of the Earth. To join you have to upload your video which shows you marching.
Why not to ask people to send their laughing videos in support, let's say, Cancer Research?
so maybe the project can be called laughforcancer or something like that.
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they say laughter is contagious and promotes good health (article)
and while we are on it, why not kissforpeace or shagforaids... ?
sorry, i do get carried away sometimes...
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here's an idea I was playing with a few of years ago, which is kind of relevant ...