FWIW I think detecting VR with Meta Quest, Apple Vision Pro, Pico VR is quite funny. It's like ... hard NOT to detect such devices. You see a huge slab of plastic on the face of someone potentially looking in your direction and the cameras are numerous and visible.
So... for Meta Ray-Ban and Oakley Meta definitely because they are designed to look like traditional glasses and that's IMHO very wrong. For others like Snap Spectacles or TCL RayNeo it's quite obvious but still, OK makes sense.
Sadly as 404 media and others reported a lot of abuse came from wearing sneakingly such glasses then coercing people with the footage. I hope people who do abuse those tools do get prosecuted properly.