I'm very much of the correctional mentality. I try to be composed and accurate in explaining to the person the real situation as I see it.
I don't actively prevent people from making their mistakes, but I am not an enabler in the slightest. Along with my correcting their take on things, I am very overtly passively resistant. I would, for example, refuse to bring cigarettes to someone who was temporarily immobile, even if a pack were at the other end of the room.
I think I can carry this on for a pretty long time. I admit that after a certain point I start entering the field of the verbally dismissive.