You can try take matter into your own hands if you believe this is common in other country. Certainly not for my experience riding in other country. Have you cycle before in other country? Where? Solo or group? How fast? How far? How often?
Australia. But solo la cos I backpack and rent bicycle from hostel and go around.
one time car horn and horn at this cyclist and this cyclist just cycle and stick the middle finger out (only one hand on handlebar) and then the driver wind down his window and stick out one hand with middle finger raised.
Both shouting at each other but it was near a roundabout so they went different routes.
I stopped cos it seemed very funny to see two grown men sticking out middle fingers and shouting “****er ****er” while moving (one cycling one driving).
In Singapore probably will have fight liao