the bubu facing juju

for those familia with the South African political scene, you may have, by now heard something about one of a prominent political youth leauge president's facebook fans, who posted, what i would call very brave racist threats, ooo I get goose bumps even thinking about it, i guess my question here is, how do YOU as a leader control/monitor the behaviour of your followers? Especially in cyberspace, thats food for thought !