No one can make a church multiplication movement happen except God. We can pray for it and plead with him for it. But we can't make it happen by the force of our will alone.
Preventing one is kind of useless, too. Especially if the movement has already gained a lot of momentum. Then we would do best to take Gamaliel's advice--"Leave these men alone! Let them go! For if their purpose or activity is of human origin, it will fail. But if it is from God, you will not be able to stop these men; you will only find yourselves fighting against God."
But if a movement has yet to begin, it is possible to do things in a way that prevents it from starting (apart from a sovereign act of God) and hinders its progress. So, what we must learn is to do things in a way that leave the possibility of a movement happening and to pray that God grants that it is so.
I like to think of it in reverse order: A movement only happens when there is multiplication. Multiplication only happens where there is reproducibility. Reproducibility happens only if the processes and activities are simple enough for almost anyone in the population to do it.
So there you have it--do things simply so that it will be reproducible and lead to the possibility of being multiplied into a movement.