This is a grey area, look at some countries where you’ve had protesters block aid trucks to refugee camps saying that their national is imminent danger from these people. I think a key here is the degree and length of traffic blockage. When it is being used to essentially lay siege to a place it is ambiguous whether it’s violent or non violent. Temporary limited disruption of traffic is probably pretty firmly in the non violent column
AlotOfReading|25 days ago