"Hey, guys, it looks like they're testing a new way to scam users on Steam. I just got a PM from someone claiming to be from Steam support, saying my account got compromised. Has anyone else gotten these fake messages?"
"Hey, I had a similar issue on Steam a while back. Turns out their support team took care of it pretty quickly, but I can see how it'd be frustrating if you got scammed. Was there any resolution for you?"