1987: Black Monday

That one didn’t really matter that much to regular Americans. Less than a third of Americans owned stock back then, and that crash didn’t have an obvious cause from actual economic fundamentals. And the Fed managed to contain the liquidity crisis, as your linked Wikipedia page describes, so that the broader economy was largely unaffected.

Recessions matter. Stock market crashes only matter when they are caused by, or are the cause of, an actual recession in the real world.

The actual data compromise happened sometime before July 2022, months before Elon’s purchase of Twitter happened. Telling people they shouldn’t have registered their real phone numbers to Twitter in 2015 or whatever isn’t really a helpful argument to make today.