People don't spam like they do on visitor messages, on threads because most people consider visitor messages a place where it is allowed. Also why should we allow visitor messages at all if they are just going to become a place for spam? They won't get infracted for spam visitor messages, however if they go out and spam on a thread they will get infracted. Then they learn from their infraction and stop spamming on threads. When you reply to a private message it quotes the previous one over and over. This means you can find the entire conversation in one message, opposed to looking through pages of visitor messages with a bunch of other people posting. Plus I don't think you should have too many problems with inbox space, considering I get pmed semi-often and I'm only at 92%. Also you could just delete really old sent items to clear space. Also if visitor messages become a place of discussion and conversation that would be a bad thing. Wouldn't we rather have our good discussion on the forums opposed to hidden off on someone's profile? The bottom line is that is it not worth implementing when the current system is more than fine.
