better validation for bulk update requests

config/danbooru_default_config.rb

@@ -348,6 +348,11 @@ module Danbooru
       "zDMSATq0W3hmA5p3rKTgD"
     end
 
+    # impose additional requirements to create tag aliases and implications
+    def strict_tag_requirements
+      true
+    end
+
     # For downloads, if the host matches any of these IPs, block it
     def banned_ip_for_download?(ip_addr)
       raise ArgumentError unless ip_addr.is_a?(IPAddr)