[ryanlol]

Even if was a mistake, that doesn't suddenly make it OK. People make mistakes, yeah. But this isn't a simple mistake, in fact this incident consists of multiple mistakes.

1) Someone wrote an incorrect config

2) They did not test it

3) They pushed it to production systems without testing it

4) They did not monitor their systems after pushing new configs

5) They took ages to fix the problem after it was detected.

That definitely isn't a single mistake.

[laumars]

And how would you propose they test it?

It's a little difficult to test this kind of config without emulating the entire internet - which is quite clearly beyond the scope of all bar a very small number of organisations.