I do too which is why I suggest people use the buddy system and maybe announce they're going out, even if it's only to friends. Last time Dark was here he snagged a lot of us before we even knew what hit us.
[Belle] First, feel free to call me Clint.
Second, I'm honestly not sure. But if a person has darkness in them, I'd say there's probably a good chance Dark will find it. Anything that can cause fear and misery, hopelessness...it's what they feed off of. Him and the people he traps.
I've heard Dark is from a book but for the life of me I don't know what it's called. If you can find it, it might hold better answers than what I can give.