It's easy to do- but not a great idea.

A.) One plant will often choke out the rest.
B.) Your females could have been growing a lot faster in veg if those males weren't in the way.
C.) When you do pull the male, you'll have to leave the root system, which will then rot in your soil, stressing your flowering girls and opening up an avenue for bacterial wilts.
D.) If your females mature at differant rates, which they will, you can't feed each plant as it needs- you have to give them all the same thing.


Other than that, it'll work fine.