Some other people suggested that you should have to pay a fee to bitcointalk in order to have a signature, this will stop the spammers.
a fee would only stop the spammers if the fee is higher than the possible reward that they get with their sig. camp. so this is not really an option.
but completely disable sigs would be really a way to reduce spam.
After merits has been introduced number of applicants on the new signature campaign has been reduced. I too that know still signature spammers are there but in bounties side. It is reallly worst ever I see.
Bounty hunters are doing useless post and some people I see post in English, but don't understand whether it is English or Alien Language.
As tighten rules by the managers signature people will change soon from spamming but bounty hunters never.