Actually I used to have a siaolang couple living diagonally below me as well. They had been non stop accusing my next door neighbour of knocking, etc etc like what GSB is doing. Sometimes I saw police officers talking to my neighbours when I went out. Honestly, after 3 years of complaining, despite my neighbour couple not even at home when the downstairs clowns make such ludicrous allegations, the police simply ignore them. Lol
This siaolang couple no choice but move out. New occupants bought the place and moved in and not even a single complaint.