Revoke guest user access after exiting?

[intgr]

This isn't very interesting for my use cases, but it might be prudent to clean up and remove the access that ego has granted after processes have quit.

However, if two ego processes are running and one quits, we shouldn't clean up until the second quits as well. So it seems we would need to store some state.

So this low priority, until I figure out a clean and simple way to solve this, or someone demonstrates an important use case for it.