From a link in a site Bill pointed to (with thanks, Doc):

Punctuation has the primary responsibility of contributing to the plainness of one's meaning. It has the secondary responsibility of being as invisible as possible, of not calling attention to itself.

http://www.press.uchicago.edu/Misc/Chicago/721833.html

Ignoring his misuse of the word reduplication when he clearly means either duplication or replication, what do you think of all the issues raised by Paul Robinson?
(not just that represented in this brief quote)