It is far more likely that we will do more good by being ourselves at the risk of being perceived as bad, than by projecting ourselves as good, and not doing anything good at all!
In this case, you are doing more bad than good by being 'good' for the world, when you are better off being 'bad' for the world, but doing more good.
Being perceived as 'bad' actually gives you more freedom to do good while being perceived as 'good' stops you for fear that anything may be considered bad.
It also helps keep things simple as there is only one you to deal with - good and bad in private and public. You have to deal with only one you - take it or leave it!