Hey
@Salmandingo,
I agree with this forum post; however, I would like to add on to it. Currently, chat customization is at a low. I believe you should be able to toggle PMs, friend join/leave messages, party invitations, and broadcasts. At the moment, there is no possible way to get rid of these messages, and I think it would benefit the community if they added these options. Customization is a huge part of Quality of Life, and there is a lot of things that you just can't customize.