Yep, anything can be fooled if you set yourself up for it. Your scenario assumes that nobody does anything to help/protect them altimeters.
I didn't post any scenario or assume anything, I just listed the failings of the human eye applicable to its use as an altimeter. Under most circumstances for most people the eye is less accurate and less reliable than an actual instrument, which is exactly why such instruments were invented in the first place.
(This post was edited by JackC1 on Nov 9, 2012, 2:32 AM)