If a group of people wants to organize to disrupt a speech, the best way to do this is to create a disruption order ahead of time. Agree who will go first, second etc. It is essential to do this sequentially in order to prolong the time of disruption.
One person or small group causes a disruption, and are subsequently ejected. Once that occurs and the speaker resumes, the next one causes a disruption. Also, zip tying one's self to a chair or table is likely to significantly prolong the disruption.
Twenty or thirty people can cause chaos for a few hours this way, and effectively deny someone a platform.
I don't know why I thought of this today. Just a random thought that crossed my mind.