住所地址應該是必填的，不過填虛假地址的話……

我看過他們網站的隱私保護政策，裏面有幾點應該有用︰
Earthjustice is the sole owner of the information collected on this site. This information will not be sold, or rented to others in ways different from what is disclosed in this statement.
網站不會把隱私資料出售，租借予他人，使資料被揭露。

We collect only the domain name, but not the e-mail address of visitors to our Web site, aggregate information on what pages visitors access, information volunteered by the visitor (such as survey information, e-mail and other addresses), and other personal information.
網站「不會」收集訪客的電郵地址，通訊地址等資料。
這裏只提及「訪客」，要是成為該組織的「會員」的話，可能會有別的處理方法。我沒有做會員，所以這方面就要你自己留意了。

Financial Transactions
To process a charitable contribution or product purchase, it is necessary for Earthjustice to gather the visitor's name, email address, mailing address, phone, and credit card information.
另外，該隱私權政策寫，如果你有在網站進行「經濟上的交易(可能是指捐款之類)」，網站「會」收集你的姓名、電郵、住址、電話、信用卡號碼的資料，用來核實及進行交易。

詳情可以觀看他們的隱私權政策，或者聯絡他們詢問吧。