Madness is good
Madness is not always bad... even if it is, then it is not always bad for both the individual and the society.
Many times, weird behaviors, which are normally considered bad for the individual (for which individual's mom would say - "son, dont do it, you are becoming mad...."), produce good results for the society.
A significant number of big acheivements (big companies, big books, big ideas, huge impacting thoughts, etc etc) were actually results of abnormal tendencies of people.