Hi,
in general please avoid mixing two different questions in one single thread. Instead please create separate threads.
1) Yes: https://central.owncloud.org/t/how-to-have-admin-access-to-all-users-files-within-the-webgui/812
2) ownCloud 10.0 will place a copy of this folder to the trashbin of user 2: https://github.com/owncloud/core/wiki/ownCloud-10.0-Features