Just being nosy... here's the source of the page (post render) piped through sed 's/^[ \t]?//;s/></>\n<'|egrep '(form|input)'

<form method="post" id="takeActionForm" action="/take-action">
<input type="hidden" id="FormId" name="FormId" value="27448">
<input type="hidden" id="AdditionalAdvocateFormId" name="AdditionalAdvocateFormId" value="27452">
<input type="hidden" id="EngagementId" name="EngagementId" value="236633">
<input type="hidden" id="UserAgentHeader" name="UserAgentHeader" value="Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.114 Safari/537.36">
<input type="hidden" id="UserIpAddress" name="UserIpAddress" value="22.40.531.428"> EDIT: I shuffled my valid external IP address...
<input type="hidden" id="RefererHeader" name="RefererHeader" value="https://www.pardonsnowden.org/">
<input type="hidden" id="RedirectToAction" name="RedirectToAction" value="Donate2">
<input type="hidden" data-val="true" data-val-required="The DisplayCampaignSubscribeLanguage field is required." id="DisplayCampaignSubscribeLanguage" name="DisplayCampaignSubscribeLanguage" value="True">
<input type="hidden" data-val="true" data-val-required="The DisplayThanksForDonation field is required." id="DisplayThanksForDonation" name="DisplayThanksForDonation" value="False">
<input type="text" data-val="true" data-val-maxlength="The field * First Name must be a string or array type with a maximum length of '60'." data-val-maxlength-max="60" data-val-required="The * First Name field is required." id="FirstName" name="FirstName" value="">
<input type="text" data-val="true" data-val-maxlength="The field * Last Name must be a string or array type with a maximum length of '60'." data-val-maxlength-max="60" data-val-required="The * Last Name field is required." id="LastName" name="LastName" value="">
<input type="text" data-val="true" data-val-maxlength="The field * Address Line 1 must be a string or array type with a maximum length of '255'." data-val-maxlength-max="255" data-val-required="The * Address Line 1 field is required." id="Address1" name="Address1" value="">
<input type="text" data-val="true" data-val-maxlength="The field Address Line 2 must be a string or array type with a maximum length of '255'." data-val-maxlength-max="255" id="Address2" name="Address2" value="">
<input type="text" data-val="true" data-val-maxlength="The field * City must be a string or array type with a maximum length of '250'." data-val-maxlength-max="250" data-val-required="The * City field is required." id="City" name="City" value="">
<input type="text" class="select-dropdown" readonly="true" data-activates="select-options-9f05dea8-21fe-9153-1eed-9b52a0b1255f" value="Alabama">
<input type="text" data-val="true" data-val-maxlength="The field * ZIP Code must be a string or array type with a maximum length of '30'." data-val-maxlength-max="30" data-val-required="The * ZIP Code field is required." id="Zip" name="Zip" value="">
<input type="email" data-val="true" data-val-email="The * Email Address field is not a valid e-mail address." data-val-maxlength="The field * Email Address must be a string or array type with a maximum length of '250'." data-val-maxlength-max="250" data-val-required="The * Email Address field is required." id="EmailAddress" name="EmailAddress" value="">
<input checked="checked" data-val="true" data-val-required="The I agree to receive occasional emails from the ACLU, our campaign partner. field is required." id="aclu" name="AcluOptIn" type="checkbox" value="true">
<input name="__RequestVerificationToken" type="hidden" value="CfDJ8NLtLyWwUzRIooGDwJFKIrt9vYAjiCpeZejgvGQHEf2k-wesrFUsmYg4qRtQqkfPwiEKAwh2k4kcf6IWPVfAsnHRaU_XfsRXCICY7oFAfiNFWVkaIi2Z5kJi6gdHw44Ht2y2Gigzh3UmtkUigpw62uU">
<input name="AcluOptIn" type="hidden" value="false">
</form>

...So, AcluOptIn is being forced to false?

I guess we can give them the benefit of the doubt and presume that my http client information is being saved to prevent automated form submissions?