This is an interesting story: http://news.yahoo.com/s/csm/20060110/cm_csm/ychinni10_1
Email increases productivity of the honest and the criminals. The evildoers have learned that the email trace would come back to hunt them. At some point they would completely give this up and go back to the old, inefficient methods. One would hope the increased productivity of the honest people would make the outlaws (the big fish at least) as an endanger species.