There are several "do not release" plugins out there, sadly I didn't find them to suit my needs - so I made this one!
What makes this one unique? It re-uses the release dialog and instead modifies it to hide the release button, until you have held down CTRL for 3 seconds, then the button is made visible and you can click on it to… release.
Trying to add a available revive check in case a healer is nearby to revive you, or if a healer has a pending revive they can use.
The addon works in Raids and Mythic+ instances. If you have suggestions, feel free to comment.
*All credit for this WA goes to Vlad @ https://wago.io/NkAOjKJ6G