It's niccas who want to fail, who set themselves up for failure, that get caught.
Whether it's a guilty conscience or a subconscious desire to get out of their current relationship or picking the wrong female to cheat with, niccas catch themselves up.
If a nicca saw no problem with cheating even though they enjoyed the benefits of their current relationship (therefore wanting to avoid reprisals if caught) and picked the right woman to cheat with, they'd never get caught up.
Edit: Also there's some basic common sense like never bringing the ho to your house, finding a jump-off who is fine with it not being a relationship, not going out in public with her, etc.