BuddyPress.org

1) 2) is solved in BP 1.1. see https://buddypress.org/forums/topic/better-avatar-crop-function

3) Well I wanted to refer to the user settings, where the user-delf-delete checkbox was in 1.0.3. But in 1.1 Ican’t find it anymore even though the self deletion is activated in buddypress’ backend settings. What happended to it?

4) The simplest way would be CSS (the activity remains in the code, though)