They definitely still exist.
Only a few days ago, I took an assassination mission, jumped to the target-system, saw a "mission-related" POI, dropped in and found...erm, a T9.
I thought it was a bit odd but then I got a "What gifts do you bring for the Pirate king?" message and then it started shooting, so I spaced it.
And then I realised I was now Wanted.
And then I realised I was still getting shot at by some yahoo in a Cobra.
And then I realised there was an unread message in my comm's HUD.
Seems that, upon entering the system, the T9 had sent me a "trader" message, thus activating a new mission-related POI, which I'd mistaken for
my assassination-related POI.
Ten seconds after I arrived in the trader POI, my assassination target
did drop in and sent the "pirate king" message.
After that, the T9 must've been attacked by my target and returned fire, which made me think the T9 was shooting at
me.
Admittedly, mistakes
were made but I think we all learned valuable lessons that day.