Before you run any sensitive polls, please note that Democracy 2 stores the answer in the cookie:
setcookie(”demVoted_{$this->id}”, $answer, time()+$cookie_last, COOKIEPATH);
Even if the $answer is numeric, it is easy to participate a few times from various computers and map the numbers to real answers. Then one just needs to read these cookies...
Aren't these cookies world readable?
I just substituted "TEXT" instead of $answer. I hope that this doesn't break anything. I have also reported this to the plugin authors blog.
Please correct me, if I'm wrong.