I don't trust these people. They were prominent in the CISPA argument, pushing infographics with claims that didn't match the bill, asking for donations and email addresses.

Now here they are on this issue, with a prominent donate button, and asking for your email. The put the email request in the middle of a form asking for name and address. They need the later because they are writing Congress on your behalf. They do not need your email for that, and so putting the email in the middle of that form smacks of a trick to get you onto their mailing list.