There's this big sandcastle a child made at the beach that I'm planning on purposely stepping on.
Why do you want to step on the sandcastle?
I know it's morally wrong but I can't resist the temptation, I'm so sick of kids.
You shouldn't step on the child's sandcastle, they will cry and their parents will get angry. You might get hit, just go to places that children don't normally go.
Fuck, how am I supposed to enjoy myself on the world if I can't do anything I want?
No one can do whatever they want, and that's what makes us human, that we are willing to sometimes be good people on purpose even when we feel like being bad. The child will be happy, and you won't have any guilt. You both win this time if you refrain from destroying it.