Post anything that you want as a comment, and post it anonymously. Anything.
A story, a secret, a confession, a fear, a love - anything. Be sure to post anonymously and honestly. Post twice if you'd like. Then, put this in your LJ to see what your friends (and perhaps others who you don't even realize read your LJ) have to say.
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note: I've turned off IP logging for a few days. True anonymity is yours.