Hey! vlk and forum friends...
I have lately had many of my friends and relatives complaining that they were confused with the autosandbox pop up and many accidently pressed contine execution button
Why not remove the continue execution button from there...and place it in a drop down menu along with open in sandbox as recommended action....and when the pop up first appears show open in sandbox [recommended] first and let continue execution option be in drop menu for user to select..
and place a OK button as in front of drop down menu.