A friend of mine spent months building a facebook group. They appointed a good and trusted friend as a fellow admin a while back. That friend's account was hijacked with one of those spam links that she clicked on.
Then went over to the group page, and made a new admin, and deleted the original two admins.
There seems to be no way to contact facebook. It says right in Facebook's help that it is impossible to remove the original administrator. Yet, this is exactly what happened.
It wasn't even the orginal admin of the group whose account was compromised. Sounds to me like you can't let anyone admin but yourself, and should something happen, expect no help from Facebook. Please note again that Facebook "says" in their FAQ that the original admin can never be removed, but this is not true. Sophos did a video detailing this Facebook exploit around sept 1.
Seems there is no way to contact Facebook on an exploit they claim is not possible (removing the original admin of a group). It's a political group, and a bunch of extremists have taken over the group that people worked very hard to build. Very frustrating.