Gandhigiri

Gandhiji said that an eye for an eye will make the whole world blind.

And the movie, munnabhai showed a lot of examples which implement this quote and show us that so called gandhigiri works.
The one example from the movie which comes to my mind is the good ol society neighbour who always spits near his neighbour's window, but finally relents/mends his ways due to the so called gandhigiri.

My question is that does gandhigiri work in today's world ? The movie depicted various scenarios at a fast track, but in real life, who knows how long can it take for some people to change, it may be hours, days, weeks, months or some times never ?

In today's jet speed world, does anyone really have the time to wait for someone to change, do they have it in them to keep being good, even if the person goes on making mistakes ?

I am all for gandhigiri, coz I believe, if your effort is genuine, the other person will change or relent, the bad can be conquered by good only. But at times the time it takes for the other person to change makes me wonder that does it work ?