It might not be a good idea if you have any concern that the company you work for may ever be involved in litigation. This was part of the training when I joined Microsoft, many years ago, as a result of the big antitrust trial: anything at all that you do on your work computer or the company network might someday be subject to discovery. I have since maintained a strict separation between work accounts, data, and activities, which exist only on company-owned hardware, and my own personal data, which only lives on my own personal hardware.

Some companies are strict about firewalling corporate data in, but I think it's also important for us to protect ourselves by keeping our personal data out.