Quote from Fortune magazine article:
"The Redmond behemoth asserts that one reason free software is of such high quality is that it violates more than 200 of Microsoft's patents."
Why, as the patent holder, does M$ produce such crappy software?
"We live in a world where we honor, and support the honoring of, intellectual property," says Ballmer in an interview.
That explains why M$ has been found time and again guilty of patent infringement - M$'s honour is not worth the spit it is spoken with.