i run this once per user per computer scoped at login.
/usr/local/bin/mysides remove All My Files file:///System/Library/CoreServices/Finder.app/Contents/Resources/MyLibraries/myDocuments.cannedSearch/
/usr/local/bin/mysides remove iCloud x-apple-finder:icloud
/usr/local/bin/mysides remove domain-AirDrop nwnode://domain-AirDrop
/usr/bin/sfltool add-item com.apple.LSSharedFileList.FavoriteItems file:///Users/$3
/usr/bin/sfltool add-item com.apple.LSSharedFileList.FavoriteItems file:///Users/$3/Desktop
/usr/bin/sfltool add-item com.apple.LSSharedFileList.FavoriteItems file:///Users/$3/Documents
/usr/bin/sfltool add-item com.apple.LSSharedFileList.FavoriteItems file:///Users/$3/Downloads
/usr/bin/sfltool add-item com.apple.LSSharedFileList.FavoriteItems file:///Users/$3/Movies
/usr/bin/sfltool add-item com.apple.LSSharedFileList.FavoriteItems file:///Users/$3/Music
/usr/bin/sfltool add-item com.apple.LSSharedFileList.FavoriteItems file:///Users/$3/Pictures
touch /Users/$3/.sidebarshortcuts
killall cfprefsd
sleep 1
/usr/libexec/PlistBuddy -c "Add :networkbrowser:CustomListProperties:com.apple.NetworkBrowser.backToMyMacEnabled bool False" /Users/$3/Library/Preferences/com.apple.sidebarlists.plist
/usr/libexec/PlistBuddy -c "Add :networkbrowser:CustomListProperties:com.apple.NetworkBrowser.bonjourEnabled bool False" /Users/$3/Library/Preferences/com.apple.sidebarlists.plist