alt Hacker NewsI believe they'd have to accept the chat request before any images would be loaded?
Looking at the app options it seems to be possible to disable media auto-download entirely; there's tickboxes for Images/Audio/Video/Documents via Mobile Data/Wi-Fi/Roaming.
Yes, I agree. This attack won't work on competent / paranoid people. What I had in mind when writing the comment: a whistleblower who wants to inform the press about illegal practices in their company and installed Signal to communicate anonymously with journalists. Somehow, a detective working for the company got their Signal ID and contacted them, impersonating a journalist.