EMC2 Popup Disclaimer places a specified post into a lightbox and adds buttons so that your visitors must click through to agree to your terms!
EMC2 Popup Disclaimer will work straight out of the box. There's a few options available from within WordPress, and future releases will feature themeable options.
Settings can be found in these locations:
The settings page is straightforward except for perhaps the "Restrict operation to directory:" setting. This is the operational directory of the jQuery cookie plugin - default is '/', which is your entire site. To specify operation for a certain directory, type it here like '/store'. More jQuery-cookie settings can be found at https://github.com/carhartl/jquery-cookie.
Things of note: