I have something else in mind now.
Until someone reads your description, they should be on a temporary "ignore list", that way they don't jump out and say something without even knowing anything about you. /tells would be exempted, as would guild, group, and help chats, but just for the main tab, this would be a way to "force your description in their face", before they can go and act like they know you and say something weird to you. Of course, they could bypass by simply double-clicking then closing it, but some people might actually pay heed, in the very least it would help the situation a slight bit better.
From what I hear, this introduction has a lot of kinks to work out. Instead of implementing it right away when still unsure about how to conduct it exactly, some alternatives should be listed that may deal with the situation a little better.