I have noticed that these spammers are very easy to spot now, they are the ones stuck on 100, 250, 500 or whatever merit number they were initially given. They haven't managed to gain one single Merit point in the last 6 weeks.
Your definition of spammer is someone who has never been merited.

I can only congratulation
McWorse for
receiving 1 merit in last 6 weeks!
Congratulation! You are no longer a spammer!
I hope that one day I will receive 1 merit because
I don't want to be spammer any more! 
Do we have statistics about:
How many accounts are unmerited?
How many accounts have never merited any one?
How many accounts merited friends?
Bought merits?
Exchanged merits?
Sent merit to alt accounts?
Sent merit because someone said something against person they don't like?
How many merits were sent because 2 persons have the same point of view of certain things? Do you have an example where someone has sent merits even if they disagreed? If you don't agree with someone you won't send him merit, that is how merit works in 99.99999% situations.
I sent you merit because you made constructive post, but I don't agree with anything written in it.
Hurray! I am not spammer any more!
THANK YOU JET CASH! 