I think to become a Junior Member you should have to earn something between 1-10 merits and that would really sort the wheat from the chaff (or the rich from the poor going by your logic) because people like you wouldn't be able to earn anything without getting merit and that is a good thing and would do wonders for this forum.
I believe that it`s necessary not only to establish the certain number of merits in order to become Juniour Member, but also to remove the possibility of putting on the signature for Newbies. Recently, I began to notice that there are more and more bounty campaigns that are recruiting newcomers for advertising their product. Newbies receive a penny, but for those who create an account farm, this isn`t a problem. If you have 20 accounts, then your petty incomes increase at times. Such offers from the bounty campaigns stimulate spam and shitposting.