So I was thinking, if you really want to have less shitposters why not change the ranking requirments, make it even harded to level up so shitposters stay away.
Make it something like this:
Rank Required activity Required merit
Brand new 0 0
Newbie 1 0
Jr Member 80 10
Member 120 50
Full Member 200 150
Sr. Member 300 300
Hero Member 600 600
Legendary 1000 1000
Copper Memb. 30 1
The table is good, it is a pity that the system works quite differently. And I think they are not going to change it