Feature idea: standard_quoting_identifiers property

Forgive me if there was already some discussion about it (I can't find
anyone). As documentation describes
(http://www.postgresql.org/docs/9.1/static/sql-syntax-lexical.html):

"Quoting an identifier also makes it case-sensitive, whereas unquoted
names are always folded to lower case. For example, the identifiers
FOO, foo, and "foo" are considered the same by PostgreSQL, but "Foo"
and "FOO" are different from these three and each other. (The folding
of unquoted names to lower case in PostgreSQL is incompatible with the
SQL standard, which says that unquoted names should be folded to upper
case. Thus, foo should be equivalent to "FOO" not "foo" according to
the standard. If you want to write portable applications you are
advised to always quote a particular name or never quote it.)"

What do you think about adding new postgresql.conf property, let's
briefly say standard_quoting_identifiers with default value off to
maintain backward compatibility, which allows to use standard
upper-case equivalents (so Foo and "FOO" will be the same, but Foo and
"foo" not) ?

Pros (that I see):

-- SQL standard conformance
-- easier migration from/to other RDBMS like Oracle DB

Regards,
Grzegorz Szpetkowski