in my case at least, I can't see when someone joins the game for the first time, or even that they logged in at all on their first steps into loka. I'm assuming its a bug but if not then oh well ill take the post down.
When the alert messages were originally made, it was before the time that Slicers had access to intro chat. Of course, that was over a year ago, but shhhhhhh....regardless, this has been brought up a few times, and I believe Mag and Crypt said that they'd fix it, and it's good to bring it up again: I just wanted to clarify why Slicers don't currently get the notifications.