The problem with that is when you involuntarily put your vehicle into a crowd. Some of these aren't visible until you take a wrong turn, and then either one of the mob ends up Garrett Foster'd or you end up like the guy in the 2nd video. That's your best case scenario. It goes downhill from there. Dude with a Glock or even a bagged Rattler vs a half dozen people with rifles and armor? Those are not odds I'd take to Vegas.
The mob should own the legal repercussions of any confrontation based on the fact that they're the instigators but in places like Portland that may well not happen. We'll see how successfully they export that to other, similar events. Though I can't help but note that the JFPK incident in this thread and even the "may day" march we had downtown last week look like they are have considerably smaller crowds. I wonder if the broader attendance has fizzled and what's left is just the core instigators.