Earlier quoted context omitted.
The problem is with the e-mailing part. A mom&pop is unlikely to track you down if you lock out their DB, but they'll likely report you to police if you contact them about it.
Is an email from an anonymous address easier to trace than remote database commands?
Emails have a bunch of info in the headers, so there is more meta-data in the email it self.
Neither is perfect for finding the culprit but one scenario has zero meta-data and the other has some.