But the text and posts are what the members come here to read. Limiting them would defeat the purpose of having a message board to begin with.
I don't think it's hard to distinguish between a signature and a post, but when it becomes NECESSARY to distinguish, then maybe the sigs are getting a little large.
Just as an Fyi - I've received no complaints about your signature. Staff discussed guidelines and we came to an agreement on what we thought would be sufficient for members.