Thanks for the feedback. I almost certainly shouldn't have included the part about the smirk, and I can definitely see how that could appear to be making fun of somebody else's misfortune. And the rest of it could have been phrased in a more diplomatic way.

For what it's worth it wasn't intended personally at the person who almost incurred the $72k bill, but more at the general concept of test/beta software gone rampant and out of control in an environment where billing has no limits. I think we've all tested some sort of software in development environments that caused havoc - but up until very recently it's been hard for that to immediately begin causing real world financial consequences...