Here's the deal with niwas and thier respected posts which produced the niwas in question-[tested by yours truly with test posts posted here then deleted]:
-If a post created by a user is deleted, and the user has 2 niwas or more in their pocket, they lose 2 niwas.
-If a post created by a user is deleted, but they have no niwas in their pocket (and instead have it in the bank), they don't lose any niwas.
-If a post created by a user is deleted, but they don't have any niwas in thier pocket (and so lose no niwas)... but soon afterwards take out 2+ niwas... [I have yet to test it.]
If a post is created by a user is deleted, by they only have 1 niwas in thier pocket... [I have yet to test it]