Unfortunately most foreigners and some sinkies don't read Straits Times and won't know the pain they cause their neighbours can lead to such physical retaliation after months of suffering.
Dripping laundry, every footstep is a stomp, jumping/ running/ stamping feet, slam door/ gates, 2-3am do laundry and clank the laundry poles, 5-6am vacuum, every morning late and need to rush and subject the owners of the unit below to hundreds of stomps from 5-6 foreign tenants and dropping of keys/ hair brush/ hair dryer/ plugs/ broom sticks/ coins/ toys/ curtain ties/ bags/ luggages/ weights between 6-9am, then loud music and more foot stamping and jumping and furniture dragging and dropping of glass bottles/ utensils between 7pm-2am...
You knock on their door a second time nia and try to talk to them nicely, they turn hostile and escalate their acts and don't bother to talk to you any more.
Go RN/ RC they will ask you to talk to TC, then TC says within the units so is HDB daichi, go to HDB they will give the occupants "advice", go to HDB a second time they will give you standard reply that you should next try CMC which has got 80% success rate if not then go to CDRT if need legal help go to CC, go to MP then MP will write to HDB which will give the occupants a second "advice"... and that's it.
Even when the occupants are tenants and there are clear HDB rules that say leasing out HDB rooms/ units is allowed provided the tenants do not cause nuisance to other neighbours.
The worst type will be when the owners rent out the whole unit to different groups/ individual foreign tenants and don't live with them... the unit becomes a zoo, no government and the tenants other than inflicting pains and sufferings on other neighbours often end up fighting among themselves and then you get lots of shouting/ screaming, bed room and toilet door and window slamming and kicking of internal walls.