I've worked at KPN, the dutch largest telecom provider. The government has mandated the company to kind'a split it's operations off from the sales. The reason is that KPN has both network & services. The goverment has forced it to open up it's network, so other providers can compete with KPN on services.
To prevent any unfair competition, operations is not allowed to tell all it knows to headquarters (for example numbers about marketshare, revenue, growth, prices etc from competitors).
This division is rather dificult to maintain - obviously, as it is still ONE company. But the fines by the OPTA (goverment agency overviewing and checking KPN and other companies in the telecom area) are easily in the millions, so there is quite some pressure.
DRM, among other technologies, is used to keep certain employees from certain information. Even IF you send a doc to someone 'on the wrong side' they won't be able to open it. Or can only see but not print etcetera.
How's that for evidence with my rhetoric. I think a person (which includes a legal person like a company) should have every right to enable and enforce DRM on his/her/their own hardware and software. It's perfectly valid, legal and morally right. Imho.