A recent video by Ami Horowitz highlights just this point. Bernie Sanders supporters are given some of the elements of the recently passed US Tax reforms but they are told these are Bernie Sanders' alternative plan. A real gotcha! Well worth he few minutes.
But lets not get too cocky, I am sure republicans too behave this way. We tend to forgive the trespasses of those in our team while we call out those who trespass against us.
So this type "changing hats" exercise is often quite worthwhile.