Although you said he runs in every lane in a lap bare with me.
If he is in a lane running in the right direction, and staying in that lane, you move or go around him. If he is changing lanes there probably isn't a hell of a lot you can do.
Being a hammer thrower, if I see an somebody in my line of sight and they appear to be in the firing range I stop or at least attempt. Why?
Even if I am in the right if I hit someone I'm the one in the deep end. IN 20 years of throwing I have only ever gone close to hitting 2 people. Once a photographer who was standing inside the cage and an athlete who was instructed by a TV crew to run across the grass (I only saw her after I let the hammer go)
Unless the operators come up with rules, I think there is not much you can do. Do not fall for his goading and especially the person who said he is an officer of court.
Yes he did it on purpose, stepping in front of your blocks.