Malaysian drivers generally do not turn their cars' indicator
lights on when they're about to make left or right turns or when
switching lanes. Some actually do, but they only do it when
they're already turning.
On the other hand, Malaysian drivers DO like to turn BOTH
indicator lights (hazard lights)
on when driving in heavy rain. It gets really fun, especially
for those behind them, when the driver is the kind who switches
lanes a lot while driving on the highway.
If the police force ever needs money on a rainy day, just
make the latter an offence and impose the on-the-spot maximum
fine of RM300 to any driver who commits it. If that isn't made an
offence, car makers can save costs by taking out the indicator
lights. After all, no one really bothers to use it properly here.