Why do you think some of us are afraid of other windies? It's all bollix that you need some kung fu to help you run your business mate. I've had a mong over here try to scare me off once. I arranged to meet the prat and told him to concentrate on his own stuff and not to bother me anymore. Job done, no broken bones.
If these sort of people are still out there threatening anyone, you just need to report 'em. Someone already said what to do with a case number etc. No need to go off and paint fences or "wax on, wax off" stuff. Just get on with earning your money and leave the coppers to sort out the mongs. Simples.