I think this might want a clean sheet design. At least as I understand it, there are issues with privacy in the fediverse/activitypub vis-a-vis non-public messages. I think it’s also an area where, in order to go the most good, you’d want simple signups and easy engagement (to say nothing of being able to trust that your info has been deleted when you delete it).
Clearly, I’m here and I value the philosophical underpinnings of the fediverse, but I think it might not be the best fit for dating.
That said, if you feel like you can solve those problems, you’d be doing a world of good if you’re right.
Aside from driving being an activity that, in my opinion, will require something approaching AGI, there are other issues to consider. Self driving cars will be completely unable to make difficult decisions reliably. How, for example, do they deal with a robbery where you just have someone stand in front of the car to immobilize it and then have the folks inside the car at your mercy? I have to imagine that either you’re producing pedestrian murder machines or serving up passengers on a silver platter.