I'm fully in favor of it. I don't care about keeping my e-mail a secret, though. I still trace my spam like I describe at [1], and have never noticed e-mail getting sent to timc+wikipedia@divide.net. If they try to remove the stuff after the plus sign, it goes in the bit bucket, though, so I wouldn't know about that.
[1] http://makeashorterlink.com/?O3F532E31
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