Oh man, thats too funny, can you imagine the glitchy smiles snapping off someones face as they slightly turn their head? All the sudden every meeting is filled with barely perceptible uncanny artifacts... So far everywhere I've worked is cameras off except for intimate meetings (and even then its optional/reciprocated), usually a few people will try to keep their cameras on to start a trend or something but I imagine ends up feeling like an idiot with the only camera on.

Create 2 scenes in OBS, one a pure black background, one pure green. Video devices always seem to flicker between black and green when they're broken.

Click the "Start Virtual Camera" button and switch to this webcam in your conference software, flick between the two scenes semi-rapidly

"ah man, my webcam is playing up"

https://obsproject.com/

you can do that with the snap filters. I use the mac app to overlay all sorts of goofy hats, sunglasses, laser eyes, etc.... onto my face to spice up dull zoom/teams calls.