It can stunt your plant. But if done correctly, you should take off some fan leaves(the large ones/a few of them) to get to your bud sites. Just dont take down the whole plants leaves if its a bush. People do it, But too many can stunt it or for to long. Goodluck
fimming is a topping method. not a pruning method. dont touch those fan leaves, riddleme is correct. its much more important the main and most effecient energy producers the fan leaves get light than the bud leaves.