[Spambayes] Spam vs time-of-day

[Tim Peters]

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Attached is a plot of # of spams sent per 10-minute bucket (based on Skip's
Date header cracking), vs time-of-day, across my subset of BruceG's 2002
spam collection.  The idea that *his* spam is mostly sent overnight is
clearly bogus.  Someone who stops looking at email at 5pm and doesn't look
again until 8am could sure get that impression, though.

The wiggly red line is a one-hour moving average.  An obvious conclusion is
that many spammers have day jobs, and send out huge spikes at the beginning
and end of their lunch hours, but struggle with software problems in
between -- IOW, they're us <wink>.

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