Okay. Let's say they've got a laptop, a wireless connection, and are driving around a neighborhood.
How do you find out whether the guy who lives at the house on the left who's getting into his car even has a twitter account? How do you find his username?
Really? Are you not thinking this through?
If you can basically pick a house at random and start compiling information about them trying to decide when to strike, you're NOT just a common smash-and-grab thief who'll kick the door in the moment the owner turns the corner on their way out of the neighborhood.
If you ARE that type, you don't really need to read their twitter page, do you? Of course you don't, you're already kicking in their front door.
If you're the type that sits in the car across the street with your laptop doing your homework on the guy, and you're resourceful enough to find out who lives there (not hard), how are you going to find their twitter username? If you're smart enough (or lucky enough) to come across that, what are the odds that reading their twitter page is going to make any sort of difference in when you're going to strike and how? You're probably smart enough to have that figured out anyway.
Okay dude let me describe how my house was broken into:
For several weeks the fellow cased my house, learning when we were and weren't home.
We went on vacation for 2 weeks, hired someone to live at our house while we were gone. This person stayed at our house 18 hours a day, and was only gone during the day.
The person decided to break in on christmas even when the house sitter went to visit her family, they brought climbing gear to rappel up the side of the house, cut the glass in our door so he could climb through without triggering the alarm.
The guy brought nothing, used our pillow cases to steal the stuff out of the house.
That guy was prepared, it wouldn't be beyond a fellow like him to use twitter to figure out when people weren't home. I don't think you give these people enough credit.
Within an hour we were out $40,000 dollars worth of stuff. A haul like that a guy could live off of for a while, so it's not beyond them to research people for a month, it's worth their time.