Let's take Hermia's case because it's the first and it's easier to think of.
"Hey, why are you planning to run away with Lysander? Don't do that! Your parents will be afraid and you'd also get lost in the desolate places you'd go to! And let's not forget about the many imminent dangers of living alone! You'd end up having to grow yourself up, well, obviously with Lysander's help, but it won't be easy at all! Don't try this at all! Stay with your parents, Lysander doesn't deserve a treatment that royal!"