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.
I doubt your doubt :-) Resisting peer pressure is easy if it's not actually peer pressure -- if you can detach yourself and basically go "oh, I'm cooler/better than that". But resisting pressure from you true peers -- people you respect, people whose opinion you respect, people who you want to like you -- that is hard.
Same thing for defying authority. It's not a big deal to defy some assistant dean on college campus who's trying to enforce some obviously stupid rule. But not many people have the internal grit to stand up to real cops (who have z...
P/S/A: There are single sentences which can create life-changing amounts of difference.