'The reason it's worth standing up for punctuation is not that it's an arbitrary system of notation known only to an over-sensitive elite who have attacks of vapours when they see it misapplied. The reason to stand up for punctuation is that without it there is no reliable way of communicating meaning. Punctuation herds words together, keeps others apart. Punctuation directs you how to read, in the way musical notation directs a musician how to play.'
from Eats, Shoots and Leaves by Lynne Trusse