Why don't people use indicators in Geelong?

Why don't people use indicators in Geelong?

I mean, not even at roundabouts. It's irritating beyond compare!! I was sitting at that big roundabout on the river, Highton I think the suburb is called, waiting waiting waiting for this car to come around, how rude of the driver to not use the indicator. I mean, sometimes it happens, people change their minds or whatever. But unless Geelong residents are the most indecisive (or the most what's the word, impulsive), as a rule, every time I go around a roundabout (say that ten times fast), at least one driver there with me doesn't indicate properly.

Including my husband. Grr.