Yes, I know you can post in chat that you need help in a certain area. I just think it would be helpful for less social people to be able to advertise their willingness/desire to group.
When I first started playing I'd sometimes stand outside a public dungeon wishing I had the courage to ask a passing player for help. If we could add a new title that read something like, "New Adventurer Seeking Companions" it would let you know that elf on the corner wouldn't mind a group invite and that they're not just waiting for their friends to port in.
Or for veteran player who wouldn't mind playing bodyguard to a newbie for the evening we could have, "Willing to help new adventurers". I know there were times I felt like offering my services to newbies but didn't want to appear pushy. It would also help the newbie who's saying to themselves, "I'm only level 16. That level 1200 would never want to help me."