a similar item, but not used by many is the "Search comment" feature. You put your message in under a specific category, like XP, Mission, etc. There is a "search by" feature that allows you to select that comment class as the filter. This feature is used MUCH more often by Japanese players, but it is available to anyone. I prefer that to an actual chat mode that sounds like a specialized /shout, but that's because I don't like unsolicited content.

I used to be incensed by all the poeple who would consistently invite me to sync parties when my comment specifically said "no level sync". The comment was there because I was trying to close a WIDE skill gap (and it said that, too). A level appropriate party would let me work on skill, a sync would simply widen the gap I was trying to close. And I KNOW that the comment displayed when they clicked on my name in the search results before they sent the /tell because that's precisely what it is designed to do, and does when I perform searches! After apparently ignoring the the comment they then have the temerity to argue with me?!

No, I think a pop-up of "did you know" items, like this, that happens during the log-on process is the way to go. The feature already exists-in a very functional form-as is, people simply need to use it. A specialized chat feature is simply 1 more thing I'll need to filter out of my display.