Ouch. Sorry to hear it. That’s all too common of a refrain from Time Capsule owners. It can be a good way to share a USB printer, though!
Sorry, forgot to reply to this. I don’t offhand see any problem with this approach. The real issues with the Time Capsule hit when Time Machine is transferring large quantities of data constantly, such that any hiccup can cause corruption. In normal file server usage, that’s much less likely.