I would take the list and rankings with a big pinch...no...fistful of salt. From much traveled experience, KL's a walk in the park compared to Jakarta, Bangkok, Mumbai top of my head.
In any event, flashing anything, even in Chubb safe Spore and Tokyo, is begging for trouble.
Agree, it would be sad if one's held ransom to crime - real or apparent - and be afraid to wear one's pleasure on one's wrist. That said, I wouldn't wear a RM just anywhere be in KL or Tokyo.