I was thinking the same thing.  I have managed to avoid doing this (to date), 
but we have had more than one operator activate/deactivate the wrong image by 
mistake.   

One of the times that z/OS (well, OS/390 at the time) and its associated 
software impressed me the most was when an operator went to activate our 
development LPAR and didn't notice that the icon for production was also 
highlighted.  (There was no point in raking him out for it afterwards; he was 
already well aware he had done a Bad Thing.)  We re-activated production, 
restarted DB2, CICS, Datacom, etc. and everything came up, backed out in-flight 
transactions, and recovered smoothly.  I would never have believed it.  
Sometimes it is brought home to you just how well some of this stuff works.

Jon



<snip>
Even sysprogs, with a good night sleep, non-critical time, and second
cuppa joe in hand can (and do) hit the wrong button.
</snip>

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