Maybe I am completely wrong, but If its true that you are saying I  think that you are among the rare bounty hunters that don't abuse bounty campaigns with alts.

Just think about, why they wouldn't do that as there is very little risk involved. I mean, even if they get caught they will just get rid off that Newbie account that got tagged and will create another one and continue with business as usual. It would be a completely different story if bounty managers set requirement that only Jr Members (or even better Member) can join as for an average bounty hunter getting even 1 merit is hard so loosing an account would hurt them. That is not in anyone's interest though as bounty managers need good numbers they can show to their clients.