How hard can you throw it?

depends on what you know about flipper zero.

The app scans for smart glasses’ distinctive Bluetooth signatures and sends a push alert if it detects a potential pair of glasses in the local area.

What do you mean "vulnerable"? Are you trying to blow them up?

I mean, the Flipper Zero is just a computer with a few radios built-in.

I think the only one they share with most smart glasses is Bluetooth which might potentially have some vulnerabilities which could be exploited, but there are also expansion cards for the Flipper Zero that add everything from wifi and ethernet ports to high-powered IR blasters, so the real question is how vulnerable smart glasses are.

And the truth is, they're vulnerable by default because they rely on corpo servers to operate like any other "smart" device. Any flaw in the security of the glasses themselves barely holds a candle to the fact that they forward everything to Facebook or some other big tech brand name with a financial interest in monetizing your data.