you need a reason for that? If so, why?
Im clueless with your question. You asked on how to have signature when you read @hd49728 replied and attached useful thread regarding your inquiry, you should be able to get how and the question why is really make me speechless.
Ofcourse this is a forum. If you read the rules that is the standard to have a signature and there is a protocol about getting the ranks in a specified order where post and activity ratio is in placed.
Kindly read it first mate and everything will be answered.