Stuff like that has happened to me before--I have since starting carrying a small pouch of medium size ball bearings that I have hanging from my faring. If someone gets behide me acting all stupid I just toss one over my shoulder. Cracking a windshield or putting a hole in a radiator tends to slow people enough so I can get away safely. All I can say is there are stupid people out there and it is a shame that we have to watch out for them. Good luck and keep riding and remember to keep an eye out for stupid people.