Numerous industries have earned the confidence of consumers despite low levels of faith in public and private sector leaders, but only one industry in a recent Harris poll has negative numbers: the tobacco industry. Fully 80% of those interviewed by telephone between Feb. 19 and 23 said medical doctors, telephone companies and computer companies do a good job of serving customers, according to a report released by Louis Harris & Associates. Seventy percent to 79% said the same about pharmaceutical companies, hospitals, banks and car manufacturers. Only one industry on the list, the tobacco industry, had negative marks "and this surely reflects . . . public hostility" because the industry sells tobacco, the pollster said.