https://www.cnet.com/news/engineer-fined-for-blogging-exactly-how-to-hack-a-hotels-wi-fi/

Zheng was staying at the hotel in Singapore while attending the Hack in the Box security conference at the end of August. After hacking the hotel's Wi-Fi, he did not report the security vulnerability. Instead he shared details on how he hacked its Wi-Fi network in a post on his blog. The sensitive information, including hotel passwords and other details, were free to be exploited by other hackers.

Zheng (known as Ricter on his blog) appears to have shut down his site, leaving a note saying, "... no more blog, see you." But the post in question can still be found on other sites, like Hong Kong's Saowen, with a quick Google search.