And this is why corporations tend to have strict policies of revoking all access before people are informed that they are fired, or perhaps simultaneously while

And this is why corporations tend to have strict policies of revoking all access before people are informed that they are fired, or perhaps simultaneously while they're being told so that when they go out of the meeting room it's already done. The vast majority people won't do stupid crimes like this, but the fraction who would can cause a sufficiently painful disruption (even if you have great backups, recovery and verification takes time, effort, downtime and organizational confusion) to justify that.