User blog comment:ZeoSpark/Dave or Mike?/@comment-21325751-20140716205350/@comment-24392440-20140716220155

Though it's far from perfect, I'd implore you to read the Wikipedia article on Stalking: http://en.m.wikipedia.org/wiki/Stalking

Stalking isn't necessarily voluntary, as it may be driven into an addiciton of sorts, but doing so would normally have needed voluntary stalking to begin with, meaning that at the root of things, stalking is voluntary.