It's a very generic P/S/A , amenable to being understood in a multitude of ways :-)
Though my personal interpretation tends towards the resistance to conformity pressure (aka "going with the crowd") and/or defiance of authority.
I doubt the LW crowd has a problem with resisting peer pressure and defying authority. If anything, I would expect them to have trouble with the opposite. So let's also say: "you can say yes." Peer pressure and authority are not inherently bad.
P/S/A: There are single sentences which can create life-changing amounts of difference.