Oh boy... It's the guy responsibility to tell her "I'm sorry, I'm not interested, I'm gay...." or "Please stop bothering me", or "It's nice to meet you but I have other life to take care of it" or "Sorry, I'm taken..so fuck off" or whatever he says!!! So, if she bothered him, I'm sure he will bring something to say.
Secondly, it's Ani314 responsibility to say, "I'm I bothering you? If I do, I will stop!" or "Want to be a team workout? I need some kind of motivation to keep in shape?" Or if your definitons "stalking" saying "I wanna fuck you", then I'm sure he will call the cop.