People without tickets? I heard that was what makes for legendary concerts like Woodstock. Personally I think that may have been Michael Lang's concept from the beginning. He wasn't a fan of the moneyed backers of the festival (didn't think they were down with the struggle or even hip). They were forced to fork over something like $25,000 to the Yippies (Abbie Hoffman) and the Black Panthers to keep them from disrupting the event (with bad word on the street and chaos at the event). They were also provided with table space and printing equipment for a newsletter at the fest. Didn't matter, the youth movement still crashed the gates, Abbie crashed the stage during The Who's performance, and I don't recall who it was that tried to steal (forcefully) the film crew's rented equipment. They burned down the "capitalist" hamburger stand.
But today we are told how it was all "peace and love".