[morninj]

Same here. Sometimes I'll also add the date when I entered the address in a form. For instance, the last time I registered to vote, I used [e-mail]. During the last election cycle, I caught a few California politicians harvesting my address and adding it to their email lists.

[alien_robot]

Ironically the CAN-SPAM Act only prevents commercial entities from doing this, however shady the practice may be. Political emails are protected free speech and AFAIK the means by which addresses are obtained is irrelevant.