Does anyone know, if I'm on a WPA2-PSK wi-fi, do other devices that are also on the same network can "sniff" my traffic.
For unprotected networks it's obvious, but what about protected?
Also, I have a pretty special audience of hackers here, so I wouldn't be surprised if someone actually tries it.
Same goes for various events and conferences.
You of course can monitor for deauthentication packets, but unless you know when/if your AP is sending them during normal operation you can't make sure that an individual occurrence is an attack or not. If someone floods them, it's easier to tell of course.
If you want to protect individual traffic in a network you have to share access/are worried about passwords getting lost, the best solution is to go to WPA2 Enterprise with per-device credentials. On CCC-run hacker events they even use it for the "open" WLAN, and just accept any username and password.
The standard response to this is that you're safe since the eavesdropper needs to know the shared key. You can look into setting up WPA2-Enterprise if you're worried about that. FreeRADIUS doesn't seem particularly hard to configure.