Basically, they believe that Louis could have prevented the whole impending fatherhood thing if he just used a contraceptive.
In a recent interview with Dish Nation, Jai Brooks commented, "Should have worn a condom. You have really got to think about the responsibilities and consequences of your actions...I really think of the consequences before I do anything."
Beau Brooks added, "When it is raining just wear a raincoat. One mistake can haunt you for the rest of your life. Be safe and make sure you know that every decision you make is the right one."
We get it...it's totally the right call to be responsible, but this is Louis' life and his and Briana's choices. So who are we to judge?