Amongst the arguing, there were some nice tests and questions posted in this thread.
Thought I'd do my own testing and post the results.
My test:
1. Dualbox 2 characters to ransack mindflayer chest in Giant Hold (Stormeye teleport, run to top, kill flayer, pick chest, recall, reform, repeat).
2. First character (A) opened the chest 5 times per run, but never looted.
3. Other character (B) opened the chest once and looted, did not re-open chest.
Results:
Runs 1-7: Relics listed for both characters, no ransack warnings.
Run 8: Relics listed for both characters, Character A saw ransack warning on chest re-open, but relic remained listed in chest (did not disappear from chest when warning was displayed).
Run 9: No relics listed for either character, both saw ransack warning on first open of chest.
So, this agrees with the tests in the other thread.
1. Ransack appears after 8 openings of a chest (not the accepted 7)
2. Re-opening of chest on same run does not make the ransack happen sooner
3. Re-opening of chest on 8th run to show ransack warning will not remove named loot from the chest
Accordingly, I have updated the wiki.