Currently the only way to hide a persons text box is to mute that person completely (voice and text) or disable chat boxes for everyone. A lot of people are using OSC tools now that spam their music titles or computer stats perpetually and it blocks the view of the player usually. There needs to be an additional item where you can choose to show or hide a players avatar where you can also hide their text box only but obviously still be able to hear them. Should be a simple thing to squeeze into the UI.