hate to admit it, but you're probably right. but you can make a
difference... i do not take advantage of the situation unless the
other party pisses me off big time. cab drivers especially seem to
be able to do that to me effortlessly 
and a kind lady passed me an unexpired coupon just now in the
afternoon, almost a full hour left on it. was a pleasant surprise
when she came over to pass me the coupon before giving the lot up
to me. like i said, what goes round comes round... i have been
giving away unexpired coupons whenever possible for a little while
now, and for the first time in a decade, someone returned the
favour. it took some time, but it happened didn't it 