The author of the text is a skilled hardware hacker who has gained recognition for cracking open various physical devices, including cars and slot machines. They have also explored vulnerabilities in water treatment facilities, highlighting their concerns about the fragility of security systems. The author's expertise spans all types of hardware systems, and they are known for causing "silly electronic disobedience." Recently, they analyzed a clever Bay Area crosswalk hack where pedestrians receive messages from Mark Zuckerberg and Elon Musk, revealing that the hackers used a modified Android application to access and manipulate the devices remotely through Bluetooth connectivity. The author's theories suggest that the hackers likely replaced existing crosswalk devices with reprogrammed units or transferred files through BLE, but they emphasize that disclosure of vulnerabilities is crucial, especially when it comes to sensitive systems like water treatment facilities.