OT: question about commenting in Acrobat 7 Pro

[Sean]

Hi,

Sorry for the OT question, but I thought some of you
might have some excellent answers for me on these
Acrobat-related questions. 

My boss raised a good question. I have a question
about how commenting works.

1) I assumed that for PDFs created with Acrobat 7 Pro,
commenting is enabled for Adobe Reader by default. Is
that true?

2) I am assuming Acrobat 7 Pro does something in the
PostScript code that enables commenting. Am I close?
I'd appreciate more technical info., if anyone knows.

3) When I open a PDF created by Acrobat 6 Pro, Adobe
Reader won't add comments. But, I can open that same
PDF in Acrobat 7 Pro and use Comments > Enable for
Commenting in Adobe Reader .... This seems to
reprocess the PDF ... is it adding PostScript code or
something? (I don't see it reprinting.)

4) But, when I open a PDF created by Acrobat 7 Pro, I
can still use Comments > Enable for Commenting in
Adobe Reader ... and that seems to reprocess the PDF.
Why?

5) If I create a PDF using Acrobat 7 Pro, can I turn
off commenting in any way other than Saving as an
earlier version of PDF or security?

6) Am using this with FM 7.1. I can't find a way to
semi-automatically apply security through the FM
interface, nor through Joboptions, only through
printer preferences. Is that the only way?

Thanks and cheers,

Sean