To put it the simplest way possible,a comparison with...meatspace's "real" world.
When say a malware spambot has already "
broke into" thousands of machines...
pretty much the only thing that certainly doesn't give a solution,
is having av products inspecting around the "
crime scene" afterwards,
if that takes place merely in order to list what info were corrupted and/or stolen.
And after the av engine's "
detective" work has taken place,
based upon already known and spotted...criminal vx fingerprints (see
signatures),
as well as the experienced detective's "inner instict" (see
heuristics)...
trying to identify and "
bust" the...malware.exe suspect.

So,the real question is not if security vendors are the internet police:
that's something that has been already answered by...themselves,
with their behavior through the years...and their advertisements/propaganda as well.
Now,if the majority of them has eventually came up nowadays to the conclusion,
that every day that passes this 'role' gets even harder for them to cope around with...
Question is,do they intend of doing something more towards today's malware situation,
or are they simply gonna continue under the same 'not-good-anymore-old' way,
"digitally" imitating the 'meatspace' police's work.
====================================A very good friend of mine,

found this image on the net the other day...
(copyright from Ikarus AV - credits to whoever designed it).
No matter what someone might believe about 'internet police',
law enforcement,the way it should take place or not etc.,
I believe that it describes today's AV industry 'panic' in the most precise way:
