'We're not anti-technology,' said David Renn, the father of two school-age children and one of the rally's organizers. 'We just want it moved away from the school. The science is there (suggesting the potential for long-term adverse effects).' Several protesters conceded they aren't well versed in the risk of radiation exposure from cell-phone towers. What worries them, Renn and others said, are studies that suggest long-term radiation exposure might be dangerous and the residents' lack of trust in the company's concern for their well-being. It didn't help, Renn said, that residents didn't know that the tower was being installed until it was under construction. T-Mobile did not respond to a request for comment Sunday. While conceding that legal remedies may be slim or non-existent, residents hope to put public pressure on the company, Renn said. Aside from traditional media coverage, he said residents hope to spread the word through Facebook, YouTube and other social networks. Los Angeles Unified School District board member Richard Vladovic, whose district includes San Pedro, supports the relocation of the towers, said Jacob Haik, one of two Vladovic aides at the rally. 'Right across the street from a school is probably not the best place to put one,' Haik said. 'It could have gone a few blocks away.' Another aide said the likely proliferation of such towers cries out for companies such as T-Mobile to develop master plans for the burgeoning industry and identify more suitable locations. City Councilwoman Janice Hahn also has taken up the residents' cause. She has asked city departments to review long-standing participation in a consortium of public bodies and telecommunications companies that negotiates leases for new cell-phone antennas. Decisions on where to put the towers do not require public hearings, which also upset residents. 'Why take a chance (on long-term risks)?' said Sally Davies, a resident and retired teacher. 'I'm not confident what they're telling us is the truth.' 