This is probably going to push me to completely close a couple of AWS accounts I setup when doing training courses so I could get certified (mandatory requirement from my work).

I'm not currently running anything and have no plans to at the moment. I've always had a mild dread that I'll suddenly get a bill for more than $0.00.

If AWS can goof in a way that causes obviously massive bills (like today), what's to say they can't goof in more subtle ways and start charging small additional amounts that many people may not notice and just pay it.