Telegram publishes users' locations online
This reminds me of a study done more than 5 years ago on this exact problem.<p><a href="https://www.wired.com/2016/05/grindr-promises-privacy-still-leaks-exact-location/" rel="nofollow">https://www.wired.com/2016/05/grindr-promises-privacy-still-...</a><p>Gay Dating Apps Promise Privacy, But Leak Your Exact Location<p>Researchers in Kyoto demonstrate for WIRED how they can precisely track the locations of people using Grindr, Hornet, and Jack'd despite features meant to hide them.<p>The mentioned research paper is here: <a href="https://arxiv.org/pdf/1604.08235.pdf" rel="nofollow">https://arxiv.org/pdf/1604.08235.pdf</a>