I can, yes. But do you realize how much that limits a person? A group is fun and all, but when you interact with the same few people everyday, you desire new aquaintances, new interactions. PMs are a largely unnecessary part of it. Being unable to input your opinion on a thread you find interesting or interact with it at all vexes me to no end. There's a sense of belonging to a community when you interact with it often, and being stripped of that ability is one of the worst moves Bungie has made yet.