We roll two by two in a single traffic lane around the southern
Loop Road. This is a non-confrontational ride to slow down car
traffic during the hours the park is open to cars.

Sounds pretty in-your-face passive-aggressive to me.

I would think 'in-your-face' and 'passive-aggressive' are mutually
exclusive.

Kantor (1992, p. 177) notes that the term passive-aggressive clearly
describes a discrete behavior