It didn't 'take down a sizable chunk of the Internet'. Site owners took down their sites because of FUD and mass hysteria.
It's risk assessment, nothing more. Some weighed the risk high and paused their site. Nothing wrong with that and not hysteria or FUD.
It's not getting tripped by "mass hysteria" to be careful and go offline for a couple hours.
Your average site is fine at 99.9% uptime.