Well, I suggest you keep a taser and a can of pepper spray on your person. When he comes near you, use the pepper spray on his eyes, and taser him in the "region." Then, try to get him on the ground and start kicking him in the nuts until you can't feel your leg anymore. Chances are, he'll be knocked out by now. Then take his wallet, get in your car, and speed off, taking a considerable amount of time to run over his chest.
But seriously, keep some kind of protection. From the looks of this story, the harassment is going to get worse, and it might even lead to rape unless something is done about it.