I laugh every time I see those pics.
The reason the vast majority didnt cross is because the memory of how you were treated by supervisors negated any trust that the company would treat you any better without a contract or union representation.
That is what those pics represented to me. The struggle between corporate greed and the little people who break their backs to make this company successful.
The team concept disappeared because no one really believed that hourly were ever part of the team.