I'm a bit miffed that Zoom "outs" you as someone with a webcam. If you have a camera, it shows up as such in the participants list. All of my desktop webcams are virtual, but Zoom couldn't know that. It gives this false notion that I'm rudely keeping my cam off, when really I'm just preventing people from seeing a static OBS virtual camera screen.

On the flip side, if you want to be sneaky, you could probably remove/disable all of your cameras in software, which then telegraphs to everyone that you don't have a camera at all, even if you do.