# this may break/do something unexpected if $self is
# re-blessed

my $obj = $self->new(%params);

# worse, the wordpress child probably doesn't have a wordpress_new()
# method, as it has no need to. The parent probably calls new() on the
# child through a wordpress-type instantiator

my $obj = $self->wordpress_new();

##</code><code>##

my $parent = Foo::Bar->new;

# after rebless, calling a documented method in the parent
# class may cause major confusion (or worse, subtle breakage far away)
# if the child has the same method overridden, and does something 
# totally different

$parent->documented_method(); # got foo and not bar!?