I was on the western highway on my 900 Hornet, doing 100k, minding my own business, and did a guage and mirror check. Noticed this cager behind me way too close for the speed I was going. I let it go for four or five K's, with plenty of oportunities for him to pass, but when I did another mirror check I looked around and estimated he was only a second away from my rear wheel. So I used a finger on the brake lever and flashed my brake lights to let him know he was way too close. I didn't slow down, just flashed the brakes. So what does this guy do, he gets even closer to my rear wheel. How close... less than a car length at 100k. So what can I do, crack the throttle, and leave him for dead, only to invite him to drag race me, or slow down and let this nut pass. So I gently roll off the throttle, and gently slow from 100, down to 80 over about a klick. Does he pass? No, he stays glued to my arse. Now I'm getting a little scared that this lunatic wants to use his car as a weapon to intimidate me, and threaten my safety. So I slow down gently to 70 klicks, on the highway, in case he knocks me down I'm not going to slide very far. This hero in his safety cage pulls out to pass me, and passes me so close that I could have stuck my knee out, and hit his passenger side door. Then he pulls back in front of me, only two or three meters in front, and then slams his brakes on! Because I knew from his previous performance he's insane, I'm ready, and thanks to already covering the brakes I brake real hard, hard enough to have the rear weaving around. I avoid hitting his rear bumper by 2 meters. Only through my heavy braking. I'm sure he deliberately meant to make me crash on the highway. At this point I'm seeing a homicidal color of red, and think of following this guy and doing serious violence to him... But I think, no, I'm better than that, so I'll do the right thing, and I let him drive off in to the distance, as the further I am away from him the better off I am. But I'm resolute that I'm reporting him to the police. So at Beaufort I stop at the local police, none there, so I call 000 and make a complaint and tell them I am more than happy to make a statement about this nut case cager. I haven't heard back from them yet... but I won't let it pass.