What do you think about me refusing to pick up a hitchhiker?
Is there a reason why you don't want to pick them up?
Maybe it is because of my strict gender roles.
It makes sense that you wouldn't want to put yourself in danger or into an uncertain situation. You never know if you can trust that the hitchhiker doesn't want to hurt you. If you don't feel safe helping them then you might want to alert the police so that they can get the proper help that they need.
Picking up hitchhikers could be illegal. I don't want to be caught doing illegal shit.
It is not illegal at all to pick someone up and be kind to others, but it does come with the risk that the hitchhiker themselves may be a bad person. You are free to choose who you help or don't help, and if you're worried then you can always opt to just not help.