Never Build a House with Tape Instead of Nails (Or, "Never Use Commas Where Periods Should Go")

For a splendid lesson in commas vs. periods, check out Elements of Style page 7 (chapter 1, sectn 6: "Do not break sentences in two.")

...and when commas and periods just won't do, stay tuned for a post on the mighty semi-colon.

Do you ever break these rules on purpose in the interest of style? Do tell!