Well, honestly, domain names are all about branding nowadays.
EMDs aren't as hot as they used to, and domain names aren't really "worth much" just cause of a name. Anyone who has a great idea and can implement it can make a website successful, regardless of the domain name being exactly relevant.
It's all about branding. Now, with caught.tv, I can see lots of potential, but it's gonna be hard.
The idea that I have is you creating webisodes. You're gonna be making a "Punk'd" style show on the web. Make it go viral, upload new pranks every day. There can be tons of money made there. You can even be famous!
That, or a harder approach like the other guy suggested... CCTV. Invading other's privacy. Following couples, see if someone's cheating etc. But I think that's illegal.
Lastly, if you have the money... You can start your own p0rn site. That can be your own niche. All your porn movies will be about a man and hot chick doing it, then the real wife barges in the room... "You got caught!".
LOL. That's all I can think of.
Good luck!