Don't let all of these debbie downers rain on your parade, if any of them have travelled as much as they pretend to, they'd understand that what you're planning on doing is not a big deal.
The person who told you that security empties the terminals at 1am was flat out lying to you, MCO is a 24 hour airport.
Those that are worrying you about safety are also out of their minds, if you want to be safe in America today, look no further than an airport, cameras, federally mandated security, police, extra airport security, air marshalls, you name it, they've got it. Airports put your at home adt security system to shame.
Here's what you're going to do, bring a backpack as your carryon, I'm assuming you're only bringing a carryon, travel lightly. Your backpack is going to double as your pillow, bring a light blanket, or a sweatshirt that can double as your blanket, pick a nice spot by a window, and take a nap after you grab a bite to eat. You'll wake up in the morning with the sun, feel surprisingly refreshed, and be a VERY short stroll from the nearest Dunkin' Donuts for a good morning pick-me-up.
Have an enjoyable trip, I understand that it's more about getting here early than it is about saving a few bucks, even though both play into it.
To the rest of you, live a little.