Has to be legitimate--they clearly left the 70% poll policy behind.

"The housing authority says a poll it conducted this spring found a smoking ban has widespread support among public housing development residents with families. Of 1,300 people surveyed, 92 percent said they favor smoke-free housing, while only 8 percent objected, according to the housing authority."

Not just a sudden notion, either:

"Boston’s plan had its beginnings 10 years ago, when housing officials tried to figure out what was causing high incidences of asthma and other respiratory diseases among public housing residents. Eventually, they focused on second-hand smoking as a cause."

This says a lot:

“A lot of people think we are trying to evict smokers. We are trying to create healthy housing.’’