Some people can break an anvil with a tooth pick.
I can't think of a normal load I've ever done that filled less than half the case. So even if you did totally mind fart and double charge a round you'd have powder spilled around the case on the press (CLUE!). Unless people are making loads they WANT to blow up... I don't really get how it's happening.
.45 ACP chamber pressures average between 14,000 and 19,000, average for most other calibers is between 30,000 and 55,000. Some "max pres. loads" hit close to 60,000. I'm sure some companies may make up their own rules, but I'd always heard it was industry standard to fire
at least one 75,000psi pressure round in all new firearms made.
"Hold my beer and watch this" may be an
especially bad idea when reloading.

But then it DOES thin the stupid from the herd.
