haha, that is another nut question.. but I will answer it anyways..

if you are gentle & humble from within your heart,its almost near to impossible for one to be truely turn bad..as your heart & mind wont let you do it..!! probably, u can just act bad but will hurt urslf whn it comes to ditching a gal or betraying anyone !
atleast, i couldnt do it..!! therefore, i never suceeded in being a true bad boy..!! :D