Yes we've all done something stupid in datacenter at least once in our lives. That's how you learn. Like i learnt the hard way to make sure rack stabilisers are installed, why you never ever install more than one node of a cluster in the same rack if you can avoid it, and why PDU's with circuit breakers can cause unintended consequences.
It is also why you always have someone 'experienced' work on the truly important kit, guiding the younger staff on the pitfalls and gotcha's. Unfortunately these days that is incompatible with outsourcing where it's all about driving the lowest cost.