![](https://lemmy.world/pictrs/image/d48b03dd-378c-4b06-b148-5dc3e7378bf3.jpeg)
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The controller itself is insecure, it doesn’t exactly conform to Bluetooth standard. There’s no indication Sony ever planned cross-compatibility, the DualShock 3 was made to be used only on the PS3 console, where the lack of authorization supposedly wouldn’t be a problem.
Of course, you can still use it on a system where you can accept the risk, as well as on the PS3, or wired. The controllers are not e-waste yet.
I said this twice on the PSA: it’s hard to tell if your device is in discoverable mode, and it’s easy to forget it in that state, or start it accidentally. I’ve caught my devices accidentally in discoverable mode many times. You could have your PC a whole week in discoverable mode and never notice it, just by having a settings window left open.
It’s more risk than most people should take, hence the warning.
Still, if you’re comfortable with the risk, you’re free to change the config and allow insecure devices.