Meta already does that to themselves every year or so, deleting all internal communications.
They've thrown away a huge amount of communication to source code commit reinforcement training data as a result. They do it to avoid emails making it into trials like this.
When there is a specific order after proceeding starts, but not before. There can sometimes be other orders as part of govt settlements like Google was recently accused of violating.
You may be thinking of certain financial institutions where it is a hard requirement, and maybe there are some other regulated industries too that have it.
Yes, they are. But I can imagine the fine/impact for this being much, much lower than the consequences of all their nefarious communication being used in trials.
