That’s basically the start of the Shadowrun dystopia. There were a lot of other things that “went wrong”, but when the government removed the liability from private security that has been protecting a hazardous materials transport from workers attacking it in the belief that it contained foodstuffs, it legitimized the “megacorp”: a corporation sufficiently powerful to impose their own legal system on their private real estate.

EDIT: In the previous histories the “Seretech Decision” was on 1999-10-26. Sources: 1 2 3 Looks like “6th edition” retconned the fictional history to start 2001-09-11 (Never Forget), so it’s unclear what and when the equivalent event is. Source: 4