Susan Asher isn't someone you want to rile. The freelance PR specialist and writer recently went to war with Wal-Mart over 27 cents and didn't stop her assault until the corporate giant waved the proverbial white flag and offered an apology. Susan Asher was denied a back-to-school tax exemption. The war began when Asher whent to buy a four-pack of headbands in late July during the state's annual back-to-school tax-free holiday. A cashier and a store manager at the Wal-Mart in Roswell said the headbands were not on the state's tax-exempt list. Asher left the store fuming — and without...