We are aware of the issue with the badge emails resending to everyone, we apologise for the inconvenience - learn more here.
If you don't need some files in your personal account, there should be a way to get rid of them without deleting them from everyone's accounts who is a part of it.
Please Please Please make it so we can join a parent folder, but not have to have all of the subfolders in that parent folder in our account. This would help simplify and save space in everyone's account!