Thats not really true. 

That's just some posters preference. 

I do have a separate buying and selling IDs, and use my very favorite selling ID to post.

As to comment regarding Siggies are supposed to "say" something deep and meaningful I have never heard anything quite so ridiculous on the boards yet.

The boards are discussion boards and there will always be differing approaches to posting on a board that has a healthy level of participation.

Unfortunately IMO there is a small number of regulars who take it upon themselves to put in place additional "rules" and "guidelines" that are non-existent except in their own minds.