The one especially difficult thing about being a sidekick is that you now have to follow the moral code and rules of your mentor, whether you like it or not. Even if you hugely disagree with part of their mantras, you have to bite the bullet, pull up your superhero boots, and deal with the fact that this is your life now.
Although this isn't always the case. There are plenty of times that folk have completely disregarded the advice and orders of their mentors - to varying results. Sometimes, breaking the rules is exactly what teaches these loveable miscreants why they should have been following them in the first place. Sometimes, however, it makes them horrendous monstrous supervillains - so you can never quite be sure what's going to happen.
Hell, even some superheroes have opted against following what their mentors have taught them - either because it prevented them from carrying out some good deed, because it no longer matched their own personal morals, or just because they couldn't be bothered.
Ranging from understandable to downright psychopathic, here are the times heroes and their wards broke the chains of their mentor's rules - for better, and also undeniably for worse.