Arnie, Micky:

Very simple: Make sure the other three
doors(or one if its a coupe) are locked
before you settle in to drive off. Then
lock your driver's.

In both mine and my wife's sedans, putting
them in park unlocks only the front doors -
regardless of what position we put the
"child-proof" switches. And believe me, it
took 15 years of combined ownership of
cars with power door locks & windows to
finally say I'm SICK OF THIS CRAP!