taking the lane, in a busy, dark street, right thing to do IMO, I’d do the same
there were no obstacles on the left for hundreds of yards and the road was in good condition.
He could have avoided riding ‘in the gutter’ without leaving enough room on the left that a moped could fit comfortably through.
There’s such a thing as consideration for other road users, and if he had have been showing much consideration I think he would have been further over to the left, whilst being assertive enough to cause people to think when overtaking him and being in a position where he only had to move out a bit to pass parked car/buses/etc.
Obviously the moped rider was a dick for the kicking action. But his position on an empty road wasn’t good in terms of avoiding invoking road rage in other road users.