In many ways it is a typical map, showing states, highways, cities and streets. But also dotting the online display are thousands of red arrows, marking spots from Bryn Mawr, Pa., to Jamacha, Calif., identifying the addresses of donors who supported Proposition 8, which outlawed same-sex marriage in California. It is exactly those arrows that concern supporters of the measure, who say they have been regularly harassed since the election -- with threatening e-mail messages and sometimes boycotts of their businesses. "Some gay activists have organized Web sites to actively encourage people to go after supporters of Proposition 8," said Frank Schubert, the campaign manager for Protect Marriage, the leading group behind the proposition. "And giving these people a map to your home or office leaves supporters of Proposition 8 feeling especially vulnerable. Really, it is chilling." . . . Mr. Bopp also said that the level set under California’s campaign law for public disclosure, anything above $100, was too low.

“There certainly would be an amount that would influence more than a few voters,” he said. “But it’s way above $100.”Opponents of Proposition 8 have condemned any attacks on supporters, but noted that those claiming harassment are already protected by laws. “Violence and vandalism are illegal, and those laws should be enforced,” Ms. Pizer said. “And sadly people on both sides of this issue have experienced some of that.”