How long does it take for warning points to go away?
Depending on what it's for. Ones for nicknames, off topic, etc, last for one month. Sometimes you can get WP's for being explicit, if you're like me and get two, then it's two months and so on.
People can report you if you do anything agains't the rules (there are alot) and then a mod decides if it's true and give one or two WPs depending on which rule you broke. The points stay for a limited time and expire eventually but if you accumulate 10 points at once, you are banned for a month
I only have three.
One for nicknames (Lana Del Slay)
Abrasiveness (calling Gaga;s monsters a group of musty cracked power bottoms)
and Flamebait (For calling Mary Lambert "Lesbian Adele")