I've had the occasional guy who dogged me too much but none since I've been married. In my experience, they don't do it if there's another male in the picture. I'm not sure how severe it should be before we'd call it "stalking," but it can be scary or just very annoying. The worst two situations I can think of were not strangers but breaking up with guys who didn't want to be broken up with. Suicide threats, violence threats, etc. Also, I don't think there could have been a better for them to ensure that I'd never want them back. Batshit crazy is not attractive. @.@
The problem I've had since then is not at the level that I'd consider "stalking" although I might call it that when annoyed. It's been from (platonic) female friends. Sorry if this is a derail, but it might fit under "benevolent" stalking and I never hear about it. A woman you've been acquaintances with, started to get a bit closer to, then got to know them a little better and changed your mind about friendship. And rather than take a hint, they'd call repeatedly, show up, cajole, argue, demand, cry and act like their best friend has abandoned them when you barely knew each other. It's very annoying and a bit scary that they're so damned interested. What the hell. Anyone know?