Your response is typical trolling - a mass extinction would be a far higher proportion of fatalities in which case most people would simply stop using forums.
You asked this question:
"Can we please have a sensible discussion of this issue and any solutions to identifying UID's that fall silent during this period and are potentially hacked/brought back to life later?"
Why would you want to catalog these UIDs that "fall silent" during this period? Why wouldn't we approach the issue as we already do?
He is suggesting the amount of inactive accounts will go up 2 or 3 or 5 fold.