I realize that but if you're online it's one click to go into the chatbox. It's not like it's a process or cost money or anything...
It may be good but having to add a chat system like that is pretty unnecessary when there's literally a link to a free chatbox everyone has access to and you can do everything the OP has suggested already in the chatbox.
If this was a new suggestion then that would be a different story. But the fact that OP's suggestion is literally already implemented and all you have to do is move your mouse and click a button is kind of making this pointless.
You're messing with my feels, bro. You don't mess with a guys feels.
You tell me my dad is dying by the doc.
Then you say he's ok.
Then you say he's dead.
wtf man wtf
Why not? It's there and it's quicker than regular PM's. On top of the fact that they can't claim that you spoke with an imposter, it's pretty safe in my opinion.
Then why not just go and use the chatbox..?
Edit: It also won't get rid of scams. People paying attention to what's going on and using a MM would help get rid of scams. You say you like the way PM's work in the chatbox and want it on the forums but why not just go into the chatbox and talk to people through there since that's already an existing option? A lot of people do.