To the OP - though I think what you did is quite amusing, be careful. The CM group was already riled up when you came upon them. Sometimes, when a group of individuals is riled up, anyone can become a target of mob mentality. You may find a bunch of them turning on you, or even attacking you for no good reason. What you may view as a little friendly disruption on your part may be misconstrued as an attack by them, and before you know it, you'll have a bunch of them surrounding you. Be careful!