How you can use Facebook to track your friends’ sleeping habits

"lastActiveTimes": {
 "3443534": 1456065265,
 "675631492": 1456066386,
 "8657643": 1456062331,
 "255277634": 1456052450,
 "6423324": 1456065173,
 "235323452": 1456065096,
 "3265233223": 1456066381,
 "2432885644": 1456064016,
 "7464340313": 1456062500
}

In the HTML source code of Messenger.com you can find an object containing userids associated with timestamps of last activity – as shown above. Given this it’s really easy to scrape and combine this data in order to get to know each user his/her sleeping pattern.

How you can use Facebook to track your friends’ sleeping habits →

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