She seems to take the advice seriously. It helps when it's coming from Ple Two - someone who feels much more at her own level than Piccolo, who just seems like he's scolding her when he's giving her advice since he's so much older, bigger and stronger.

And though Madoka doesn't necessarily think it's all that bad advice, she can immediately see the problem.

"But.. how do I know who would take advantage of it..?"