Enough people have complained to the city about drop-off containers for used clothing, mostly in grocery story parking lots, as being magnets for graffiti and trash, that San Jose’s Planning Commission agreed earlier this year to do something. But some people suspect this is part of a larger strategy by Goodwill Industries, Inc. to put up a little more red tape for companies that own the scattered-about donation boxes. A proposed ordinance is criticized in a letter submitted to the public record for Wednesday’s Rules and Open Government Committee.