Just call us Fido.
We won't sell or give away your information, ever.
And we promise that we'll not torture you with copious quantities of blithering emails. When we contact you, we'll try very hard to be entertaining, if not enlightening, and we pledge self discipline about how often we reach out to you. Occasionally we may partner with other organizations to share information that we think will intrigue you, but the message will always come from us. And we'll be thoughtful about this as well -- we hate all versions of spam, with the possible exception of the Monty Python song.
If at any point you don't want to hear from us any more, just email us at email@example.com and we'll pull your contact information from all of our mailing lists.