More 'No Tech Zone' signs appear in San Francisco as artist reveals identity

Local artist Ivan Cash unveils himself as the perpetrator of the infamous signs, which have reappeared in several parks across the city

When an official-looking "No Tech Zone" sign appeared in San Francisco last month, authorities were left confused by its mysterious arrival.

The sign was swiftly taken down, but not before sparking the city's interest, leaving residents to assume the sign was a protest, the latest symptom of the battle between San Francisco's insurgent tech sector and its long-term (and, some claim, long-suffering) residents.