No, I've never reported anyone to the police, but if I were subject to someone trying to endanger a whole group I sure would like to. Most close calls with drivers I've been on my own on a mtb, which makes it easier to just go hopping off the road...

Ceres meets at Kjeller and rides northwards, not much traffic there and we rarely feel harassed.

"Rulle" - I don't know Paceline?