Fulfillment company: the order you put in our system is wrong, the hours we needed to correct this will be charged to you (Red: or rather my employer)

Me: *Checks logs and our server - finds out the order was made in their own webform/webapp*

Me: hey how come I can put in values in your webform that should not pass sanity checks, thats weird (in this case it was a product w/ a quantity of 0)

Fulfillment company: we don't do sanity checks or validation, we just find out when shit crashes and burns, nothing weird about that

Me: WTF