So Shift Escape, Locks out only anyone who doesnt know that sequence....or just to protect inadvertant key presses while ur away. Why not have an option to put in a password for locked out. and better if it can be any word on the fly....so you can make it up each time....You just have to remember what it was when you come back....So ie. need to go to the lav...Shift/Escape....window pops up or in command line option for Password...Type in a a password. No one but you can now open it back up.
come back...Shift/Escape...then type in last password u used. goo to go
Robin.