I know this has most likely been posted many times, but I'd like to add a solution to chat pollution as well as options to make prox chat viable. I realise that chat in the tower and other social locations aren't exactly the best places for prox chat (as there'll be a crazy number of people talking and it'll just get annoying) and because you're not in the action so to speak, you can take the time to invite them to your fireteam and chat in there, but here I'm talking about the instances in which you run into other guardians in the world. I think during public events and other explore activities in which you run into other guardians and talking becomes a bit more crucial on the fly, a button press (if it can be configured at this stage) to chat within a certain proximity would be a good idea (or even activated once the player engages in the event) to make co-ordination in-event easier than inviting them to a party chat. There are obvious work-arounds but an event-based prox chat would be a very nice addition to make free-roam events more social and accessible.