prevent chat when no shout privs

init.lua

@@ -169,6 +169,11 @@ function chat3.send(name, msg, prefix, source)
 	end
 
 	local sender = minetest.get_player_by_name(name)
+	local privs = minetest.get_player_privs(name)
+
+	if not privs.shout then
+		return
+	end
 
 	for _, player in pairs(minetest.get_connected_players()) do
 		local rname  = player:get_player_name()