Remember the failure SCO group that tried to claim property on all of Linux?
That was Microsoft backed by proxy

From:
http://www.usenix.org.uk/wiki/200906...-Linux_Lawsuit

"On the same day that CA blasted SCO, Open Source evangelist Eric Raymond revealed a leaked email from SCO's strategic consultant Mike Anderer to their management. The email details how, surprise surprise, Microsoft has arranged virtually all of SCO's financing, hiding behind intermediaries like Baystar Capital."