I gave the aclu a one time donation years ago. I have been hounded ever since with hundreds of letters begging for minimum donations. They are the worst. I have tried to call and email and get off the list, to no avail. I don't believe in their political pandering and some of the "at the moment causes". If you don't want to be harassed on a regular basis don't give them any money and god forbid your contact info.
American Civil Liberties Union