I went through some of the links and not all are handling bounty projects, some are sharing bounty projects on a different platform, some projects also wish to handle their campaigns themselves without hiring anyone and this should be allowed. The forum does not encourage strict standards as they are limiting.
A newbie account should ideally hire a highly trusted escrow to hold the funds.
One has a choice of whether or not to join a project advertised by a newbie or a higher ranked member, putting a restriction on newbie members or making strict rules are things theymos might not want to do;