When the host initially starts a meeting/class/event they should consider taking these steps:
Once the host is ready, allow participants in from the waiting room. Leaving the waiting room enabled at this point will allow control of additional participants joining, but may be cumbersome for the host to manage, in which case it may be necessary to disable the waiting room. One strategy that could help spot the kind of opportunistic intruder groups that have disrupted other meetings is to watch for spikes in meeting entries after most legitimate participants have joined. It is highly suspicious for 6-12 participants to join within seconds of each other and well after the meeting has begun.
As the meeting proceeds, only ease the restrictions made above as necessary. If there is no need for participants to use the chat or annotation features, for example, leave them disabled.
In the event of disruptive behavior in a meeting, remain calm, and regain control. Depending on the method of disruption, take these steps, in order, to stop the behavior first, before securing other avenues for misbehavior:
    								                                                        501 E. High Street 
                                                                                                    
                                                                                                                                                                                        Oxford, OH 45056
                                                                                                                                            								    
    								                                                        1601 University Blvd.
                                                                                                    
                                                                                                                                                                                        Hamilton, OH 45011
                                                                                                                                            								    
    								                                                        4200 N. University Blvd.
                                                                                                    
                                                                                                                                                                                        Middletown, OH 45042
                                                                                                                                            								    
    								                                                        7847 VOA Park Dr. 
                                                                                                    
                                                                                                                                                                                        (Corner of VOA Park Dr. and Cox Rd.)
                                                                                                    
                                                                                                                                                                                        West Chester, OH 45069
                                                								    
    								                                                        Chateau de Differdange
                                                                                                    
                                                                                                                                                                                        1, Impasse du Chateau, L-4524 Differdange
                                                                                                    
                                                                                                                                                                                        Grand Duchy of Luxembourg
                                                								    
    								                                                        217-222 MacMillan Hall
                                                                                                    
                                                                                                                                                                                        501 E. Spring St.
                                                                                                    
                                                                                                                                                                                        Oxford, OH 45056, USA