I took my family to a Szechuan restaurant one time.  The staff realized this was a white family outing and made the spices mild.  So I was shocked to hear my family's reaction:  "Wow, that food was so spicy!  I could hardly eat it!  My eyes and nose were running!"  My family are adventurous types and not whiners, their systems were just not prepared to deal with any level of those spices.