Some javascript code that allows you to automatically delete all members from a facebook group.

fb_delete_allgroupmembers.js

// first go to https://www.facebook.com/groups/XXXX/members/
// then paste this in the javascript console
deleteAll = [];
deleteAll.elms = [];
 
deleteAll.canClick = function (el) {
  return (typeof el != 'undefined') && (typeof el.click != 'undefined');
}
 
deleteAll.load = function() {
  deleteAll.elms = document.getElementsByClassName("uiPopoverButton _p uiButton uiButtonSuppressed uiButtonNoText");
  if (i < deleteAll.elms.length - 5 && !more[0].hasChildNodes()) {
    setTimeout(deleteAll.getMore, 1000);
  } else {
    setTimeout(deleteAll.go, 2000);
  }
}
 
deleteAll.getMore = function() {
  more = document.getElementsByClassName("pam uiBoxLightblue uiMorePagerPrimary");
  if (typeof more != 'undefined' && deleteAll.canClick(more[0])) { 
    more[0].click();
    setTimeout(deleteAll.load, 2000);
  } else {
    setTimeout(deleteAll.load, 100);
  }
}
 
deleteAll.go = function() {
  try {
    deleteAll.doClick(1);
  } catch(e) {
    setTimeout(deleteAll.load, 1000);
  } finally {
    setTimeout(deleteAll.load, 500000);
  }
}
 
deleteAll.doClick = function(i) {
  deleteAll.elms[i].click();
  setTimeout(function(){deleteAll.doClick2(i)}, 1000);
}

deleteAll.doClick2 = function(i) {
  document.getElementsByClassName("_54nc")[1].click()
  setTimeout(function(){deleteAll.confirm(i)}, 1000);
}
 
deleteAll.confirm = function (i) {
  remove_but = document.getElementsByClassName("_42ft _42fu layerConfirm uiOverlayButton selected _42g- _42gy")[0];
  more = document.getElementsByClassName("pam uiBoxLightblue uiMorePagerPrimary");
  
  if ((i < deleteAll.elms.length - 5 || !more[0].hasChildNodes()) && deleteAll.canClick(remove_but) && remove_but.value == "1") {
    remove_but.click();
    setTimeout(function(){deleteAll.confirm2(i)}, 1000);
  } else {
    setTimeout(deleteAll.getMore, 2000);
  }
}
 
deleteAll.confirm2 = function(i) {
	node = document.getElementsByClassName('uiContextualLayerPositioner uiLayer hidden_elem')[0];
	node.parentNode.removeChild(node);
    setTimeout(function(){deleteAll.doClick(i)}, 1000);
} 
 
deleteAll.load();

Babrath, can this script be tailored to dump out the blocked list? I need to clean it out as it's over 9k, and we can't tell if a member is messing with the current membership by deleting them, or blocking them indiscriminately.

how do you run this on Mac Chrome?? Please help I need to delete two groups ASAP