Microsoft is the latest company to upset city officials by using sidewalks and other public property for a "guerilla" marketing campaign. According to the Associated Press, "In New York, municipal workers removed hundreds of Microsoft decals on Thursday and planned to remove hundreds more on Friday. ... 'We intend to hold your firm directly responsible for this illegal, irresponsible and dangerous defacing of public property,' Cesar Fernandez, the department's assistant counsel, said in a letter to Microsoft. Fernandez said Microsoft could be sued if it sticks more ads on city property." Chicago and San Francisco have also dealt with similar illegal ad campaigns by IBM, Snapple and Nike. "In April, IBM paid San Francisco $120,000 in fines and cleanup costs for an ad campaign in which sidewalks were spray-painted with ads. Chicago also fined the computer maker for similar corporate graffiti," AP reports.