So, one local example, and I wish I knew that this was the case when it was going on live, vs finding out later. I blame my kid for being a bad communicator. ha.
The protest in Fort Lauderdale was quickly organized, in a matter of hours, by BLM and another group. It was originally going to be at Lauderdale by the Sea or Lauderhill, but I guess something blocked that from happening, and they quickly changed to downtown Fort Lauderdale by Huizenga park. I think this was going on around 1-2pm. The march/protest was scheduled for 3-6pm. Everything after 6pm was either people who decided to keep it going, or others who showed up later.
They have a network now to be able to schedule these. So, many of these bad actors, may have known about what was going on in Miami and been in the area, already were in the area to be 'stationed' just in case, or do live around here and came out of the woodwork.
So, I'm not shocked the local community was able to organize fast. I'm shocked how fast 'bad actors' could jump in and disrupt.
Part of my argument against my kid going to the event (#1 was how stupid they've all ended up; tear gas, etc), was that he'd be just another White kid wanting to scream at police, voicing his opinion, blocking the voices of others, potentially upsetting a cop (or worse, a jacked up meat head), and leaving that community to deal with it later. I'd rather he write letters to the local police and sheriffs to ask about their policies, and/or demand change.