Setting Discord Links as Playable Media bypasses Viewer's Settings. It will open Discord right away without any Viewer request. I was using Second Life Viewer, and if was on a Media texture or set into Land Media, I have no idea, but it actually happened to me on a Club, which is a Public place that draws people in by direct invite. This time was a Discord Private Server Invite, next time can be something else. The person that was provoking this had access to land settings. An older Resident might be able to deal with this, a New Resident, with Media set to auto-play, will be subject to an unwanted incursion that is mostly invasive. Discord Links specifically should be blocked when set as Media. (I think I posted on the right subject, if not let me know and I'll move it to the most appropriate one)