[rhinoceraptor]

If you were a blackhat, burning a 0-day at DEFCON would be a huge waste. You probably wouldn't get anything interesting, and chances are someone would catch it.

[Kalium]

At DEFCON, it'd be a job interview. Assuming you are looking to work for Raytheon or similar.

[tptacek]

You don't need to do any kind of performative hacking to get a job at Raytheon.

[Kalium]

Nope, you definitely do not. It would definitely get the attention of some vulnerability development types! But there are also more professional - if occasionally less fun - ways to go about that.

If memory serves, the "open" network has seen novel attacks used in years past. But not many.

[p1necone]

It would be fun though

[jjoonathan]

And even more importantly, it might prove somebody wrong about something.

[saagarjha]

A lot of people burn zero days for cred.