FEATURE: only limit new registrations from that IP if all the users from that IP are TL1 or TL0

lib/spam_handler.rb

@@ -3,6 +3,12 @@ class SpamHandler
   def self.should_prevent_registration_from_ip?(ip_address)
     return false if SiteSetting.max_new_accounts_per_registration_ip <= 0
 
+    tl2_plus_accounts_with_same_ip = User.where("trust_level >= ?", TrustLevel[2])
+                                         .where("ip_address = ?", ip_address.to_s)
+                                         .count
+
+    return false if tl2_plus_accounts_with_same_ip > 0
+
     tl0_accounts_with_same_ip = User.unscoped
                                     .where(trust_level: TrustLevel[0])
                                     .where("ip_address = ?", ip_address.to_s)