You don't know that they aren't.
Look, just like there are incompetant programmers that write bad
code there are incompetant lawyers that badly prosecute or defend
a case, and there are judges who don't get things right either.
You don't know what happened in these individual cases until
you have studied the court records in detail. Furtunately
judgments are usually available online so you can read these
in full. Why don't you select an example of your choosing
and study it?
Anti-patent news media will select the most sensationalist
aspect of the case and portray it unfairly in order to attract
YOU to read it. It doesn't mean the case is indicative of
a bad system.
Slashdot seems to have gone down the road of sensationalising
this subject. The same way that non-tech news forums
sensationalize stem cell research.
The most amazing part is that the most UNtrue posts get the
highest moderation value.
This has now become a forum of people who have collectively
agreed to NOT understand the patent system and support each
other in a voice of a non-cause. It's a totally invalid and
non-sensical rebellion empowered by concensus.