actors do alot of interviews in the same day, so saying that his fidgiting is a drug problem is a bit short sighted, if you didnt know he had one wuld you suspect it??? the character joker was fidgity and its just as possible he created habits when playing him because i dunno if anyone has tried...
i bet yous were all as good as him at 15 ay professionals, hes better than all yous so leave him alone