Wait, I fail to understand how this collapsed into an argument. These are SUGGESTIONS. Meaning, they may or may not be implemented under two main conditions: 1. The system allows for the change 2. The administrator's discretionary approval.
To address the reply to my add-on to the primary suggestion that was originally authored by xxErraticEmilyxx (that was a mouthful), I too don't have a real issue with PMs directed my way. The question starts when a 40 year old man would rather PM a 15 year old girl directly, than talk to them in the main room, braving the prying eyes of moderators because they have nothing to hide. I didn't just fall off the turnip truck, as it were. It doesn't take much reasoning to conclude what the intentions are. Whereas, I personally don't have an opinion either way on the PMs, I would rather the younger users feel relaxed and sacrifice the comic relief I get every once in a while from a random PM. That is where my add-on suggestion came from. I thought, well maybe the better system would be to have everyone blocked natively, and then have the option to unblock them. Then I connected this naturally, to the friend system on the site. Currently, there aren't really any implementations on the site that award friending someone with any advantages. Through my reasoning, If you add someone as a friend under personal discretion, you trust them enough to not send you creepy PMs. Thus using something that is already a feature of the site to do the "unblocking" for you; eliminating the need to either go on a blocking or unblocking spree every time one enters the chat room. This takes the original suggestion, adding the convenience of native protection, and giving user discretion via adding/removing friends. Other advantage: elimination of spam PMs.
Hopefully that explains it.