I remove loads of fan leaves all the way through my grows.
Never had any problems so far.
If what people say is true i would have super giant plants if i didnt cut any leaves off huh?
As it is i just have huge 3 foot colas of super crystalized bud and hardly any leaf.
Dont believe the hype and always read about your own particular strain.
Some strains do not like to have their leaves removed whilst others will flourish as long as they are well looked after and you expose much more of the plants buds to the light.
HAhahahaha
I have already removed many leaves from this plant:

And nearer to harvest even more are taken away to gain maximum light exposure to the buds.
