Not sure that would be a good idea. Somewhere for the user would be much loading time involved for generating the screen, and he dont know whats up
Automatic screen update will result also in little kids clicking that 100 times trying to bring the server down. That we can be 100% certain on. A "updated already" like now could most likely not be implemented
For join form, we may end with the same issue as for update. Will need to wait for an answer of Mark, but iam pretty certain the potential risk it could bring is enough to decline the request