Melvin Hughes, a homeless man hired by BBH Labs to provide and promote a mobile 4G Wi-Fi service during SXSW, holds the T-shirt he was given by the marketing agency in Austin, Texas on Tuesday, March 13, 2012. A charitable marketing program that paid homeless people to carry Wi-Fi signals at South By Southwest has drawn widespread debate at the annual Austin conference and around the country. BBH Labs, a unit of the global marketing agency BBH, gave 13 people from Austin's Front Steps Shelter mobile Wi-Fi devices and T-shirts that announced "I am a 4G Hotspot." (AP Photo/Jack Plunkett)

Associated Press
Melvin Hughes, a homeless man hired by BBH Labs to provide and promote a mobile 4G Wi-Fi service during SXSW, holds the T-shirt he was given by the marketing agency in Austin, Texas on Tuesday, March 13, 2012. A charitable marketing program that paid homeless people to carry Wi-Fi signals at South By Southwest has drawn widespread debate at the annual Austin conference and around the country.  BBH Labs, a unit of the global marketing agency BBH, gave 13 people from Austin's Front Steps Shelter mobile Wi-Fi devices and T-shirts that announced "I am a 4G Hotspot." (AP Photo/Jack Plunkett)
Melvin Hughes, a homeless man hired by BBH Labs to provide and promote a mobile 4G Wi-Fi service during SXSW, holds the T-shirt he was given by the marketing agency in Austin, Texas on Tuesday, March 13, 2012. A charitable marketing program that paid homeless people to carry Wi-Fi signals at South By Southwest has drawn widespread debate at the annual Austin conference and around the country. BBH Labs, a unit of the global marketing agency BBH, gave 13 people from Austin's Front Steps Shelter mobile Wi-Fi devices and T-shirts that announced "I am a 4G Hotspot." (AP Photo/Jack Plunkett)
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