He knows what POS means. But calling it a piece of shit isn't entirely the fault of the manufacturer. It's also the fault of the retailer or installer for not changing it to something that is unique to that location or company.
I own a padlock that allows me to set the combination by removing and rotating 4 dials to the letters or numbers that I want. It ships with a default combination of 0000. If I used it straight out of the package, does that make the lock a piece of shit just because it has a easy to guess default password? Or does it make me an idiot for using the lock without changing the password?