This yearly tradition has provided me and my friends with plenty of opportunities to be as creative and unique as we wanted to be over the years. For me its not all about scaring others, but an expression of creativity.
I really like the community feel behind this. I think that is the best way to inspire people in general. Giving back to one's own community is a wonderful way of allowing for creativity. Like others have mentioned I think it would be interesting to have a points system involved. Other than that maybe adding a recap of the meeting and the ideas brought up, would be a cool feature. Just some ideas.