For example a Junior Member needs 10 merit points to become a Member while a Sr.Member needs 500 merits to rank up, I think it should be the opposite, if the aim of the merit system is to lemit the number of spammers then a new registered member should provide more effort to prove himself.
If he succeeds to collect a high number of merit and ranks up, that means he is not a spammer and ranking up should become easier.
What do you think?
A spammer is not limited to newbies. There are a ton of spammers with Full Member, Sr Member, even Legendary ranks. Making it easier to rank up after Member (or whatever ranks it is) would be interpreted: "Hey, congrats on ranking up to Member/(anything)! Now you can spam more without fear!"
Btw, merit means the higher your ranks mean you have more contribution to this forum through your post. It is not solely to defeat spammers, but also as a "reward" for contributive users.