Home Depot ignored Alan R. Sporn for almost two years, but a $1-million court judgment got the company's attention. The Laguna Hills businessman had his Social Security number stolen, which ended up in a dozen requests for Home Depot credit. The fiasco hurt Sporn's credit rating, but the home improvement giant that prides itself in customer service brushed off his concerns — until he filed a lawsuit, won and then tried to collect the money from a company bank account.