Hi,
I don't want to barge in on the serious OT replies concerning motives, ethics and religion as posted above, but the OP question is:
"How do I turn off the exchange e-mail PIN lock?"
(Not: Is it bad? Should I comply with my admins? How does exchange admin work? Lets discuss exchange hosting! How about moms applepie? Or other such topics... jeez.)
An approach to adress the actual question posed, is to use an email client that is flexible in it's perspective on exchange policies, such as "Enhanced email" or "email+", both found on market.
Hope this helps someone, YMMV of course.
PS
(Now, please carry on with any OT discussions, they don't annoy people looking for real solutions at all. Should we work for corporations? Is open source good?)