So this is sort of similer[not exact by any measure], maybe it will spark your brain.
So, some years back I hung with a group of folks and we all got along peachy, then over a fairly short period(about a year) one of them decided, for no good reason(according to people who we both knew), that he hated me. At first he tried running me off from all the old hangouts either by being a dik, or lying about the property owner's wishes, or lying to the property owner. I will name him Dik
Well there were a number of people there I still got along with, so I just started showing up and kind of flaunting the fact that I was there and didn't give rip about Dik's wishes(basicaly just ignored him). I also asked people on occation if they knew what Dik's problem with me was, because the answer would always make Dik look like a dumbass, answers like: "He thinks you did(or do) such and such action." (which they all know isn't my style) or "I don't know.". Eventually my presents annoyed him so much that he moved on, but not before he ran his reputaion into the ground.


Oh and what lameass can't take a little tire rubbin'? As a kid we would play sort of a cops and robbers chase game, during which we would fully grind treaded tires together while pedaling as hard and fast as we could(not quite knobbies). Your tire gets bumped, you may wiggle a bit, and you keep pedaling simple as that.
Of course if there is 6 inches of overlap and the guy in front decides to pull off in that direction then there may be a problem, for the guy in back anyway, but thats a risk the guy in back took, so as they say "reap what you sow".