yeah Id be concerned with the lack of communication with bringing in any outside devices. What do your company policies say?
Things like this are why I created a policy for IT use. No misunderstanding when its in black and white.
They do not need to know why its not allowed, just that its not.
Edit: Managers don't think of things like this:Each printer has network connectivity and they support firmware upgrades. If the firmware is not signed or signing material compromise or vulnerability In that area, it can help a attacker push malicious upgrade which can have virus inbuilt. This has happened for all digital photo frames by a company which had virus disguised in compromised factory shipped firmware. This Compromised printer can push virus to other computational devices in network