Then why theymos is still not implementing the 1 merit to achieve Jr. Member. If I am not mistaken, this has been talked about from the thread created by yahoo.
That is not a solution to this. Assuming they have high ranked accounts as well from the past, they can easily bypass 1 merit limit to reach the next level.
I disagree. I think requiring at least one merit requirement will go a long way to curbing bots and farmers from ranking up to Junior. Besides, if someone was abusing their merit in this way it would become very easy to spot the abuse once they started only meriting newbies or blatant bots with crap posts. Your merit source doesn't last long either and they'll soon run out, but I still think it will be more of a giveaway if they start meriting their own accounts rather than a hindrance.
There should probably be something more practical to the cause, that should stop this for good, and I know it is not a piece of cake to come up with something that can tackle such actions, but there is no other choice.
It's one of the better options we have, but without other suggestions I don't think you should shoot it down.