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I agree with @_refugees_@ point that there are a lot of people that wouldn't use it. I would imagine that the people that will use it the most are the people that don't tend to interact with new users anyways. Those that tend to be the "welcoming" type on Hubski aren't going to be prone to use it. Therefore, it may have little effect on the newbie but a potentially large effect on the seasoned user that wishes to avoid the newbie onslaughts.