A knock on the door at 2:30am

Here I sit, at 2:30am, creeped out and quite awake after an encounter with a stranger at my front door. My dog, Fred, jumped out of bed and started barking ferociously in the front room. When I finally realized that this bark was not the bark he uses to scare away passing dogs from the front windows, but a much more angry bark, I got up and instinctively grabbed my cell phone. I have a large glass front door, and standing in my doorway was a young kid, probably 18 or so, shakily holding on to my front door with his eyes closed. When I approached the door I asked him what he wanted. He lazily opened his eyes and then mumbled that he wanted a glass of water. I told him that he needed to leave. He stood there for another minute, eyes closed. I told him again that he needed to leave and that I was calling the police, at which point he took off his baseball cap and held it above his head, then opened his eyes and stared me down. I called 911, and asked if they could send someone out. The kid staggered away.
The exchange was quite creepy. I'm pretty sure the kid was messed up on something, be it weed or booze, and just didn't know where he was, but for someone just coming out of a deep sleep, it was eerie and gave me that sick feeling in my gut that you get when your heart starts racing and your brain tries to suppress the flood of fight or flight chemicals that come with a startling situation. Thankfully, I have Freddy here to keep watch over the house and yard, but even Fred doesn't want to leave the front room, now, in case something happens or the stranger comes back.
Sitting here, listening for every creak and thump from the outside world, I can't help but chide myself for watching all of those reality crime "investigations" on MSNBC. Especially the one about the four people in Wichita, who responded to a knock on their front door and endured hours of assault, rape and finally, death. The logical part of me knows that the chances of that happening to me are quite astronomical, but now that the thought was planted there by the ominous reporting staff at MSNBC, there is a part of me, living inside the irrational part of my brain, that is terrified and assuming that I just thwarted a full scale robbery and assault with the help of my trusty sidekick, Fred, and my cell phone.
While I know that I'm lucky in many ways, after all, the police are currently darting up and down my street, and the adjoining side streets, with flood lights attached to powerful SUVs, I also hate living in the city during times like this. I have being exposed to crime and crazy and the chaotic randomness of things, because of my surroundings. I know that crime exists everywhere, but that doesn't make me feel any better at 3:00am, wondering who that kid was, and whether or not he was simply a person genuinely in need of water and help, or if he was really playing passive to gain entry to my home. There is a part of me that wants to believe that people are generally good, and that we have become a nation of freaked out potential victims because of our daily exposure to all the bad news and crimes we hear about on the news. The news organs know we can't resist hearing about the latest rape & robbery, or the gruesome details of a home invasion or car jacking, but I think the fascination is more about our curiosity of seeing a car accident and craning our heads to see the gory details than it is about educating ourselves about the surrounding environment and protecting ourselves and our loved ones. But then there is a voice in the back of my head that tells me that part of me is naive, and that I should be wary of everyone, and trust nothing.
I'd like to hope that those two voices meet somewhere in the middle, and that I can believe in the good of people without becoming a victim, and be cautious and street smart without living a life of angry, grinchy, selfishness.
I'd also like to get some sleep - but those two voices are still yelling at each other.