There are a multitude of opinions among Wikipedians on
litigiousness, ownership, etc. There's also a multitude of levels of
knowledge among Wikipedians on the applicable laws.
Also extreme variation in terms of personal risk tolerance and aversion,
also in understanding the way that the legal system works.
Personally I'm pretty much of the opinion that
copyright law is evil
and should be repealed. I've had conversations with other Wikipedians
who fall nearly on the opposite end of that spectrum. And the vast
majority fall somewhere in between. And yet, I think it's possible
for us all to get along, so long as we can agree that Wikipedia is
going to A) be a free work; and B) work within the law.
Even if we agree to that,
interpreting "B" depends on our knowledge of
the law. Those of us supporting a more aggressive legal position are
not advocating breaking the law.