I wonder if drivers would get more aggressive (or less aggressive) if they see a Waymo on the road.

Perhaps this driver thought that Waymo would have stopped once it noticed what was happening:

"In Tempe, Arizona, an SUV 'overtook the Waymo AV on the left' and then 'initiated a right turn,' cutting the Waymo off and causing a crash. A passenger in the SUV said they suffered moderate injuries"