The only thing we are 100% sure of, is that Krav Maga does not help during selection. In a more serious note, its easy to distinguish between "safe" comments and "questionable" ones, as the current and ex Legionnaires have their forum name written in green.
That said, everyone should keep in the back of their minds that we do not really know what is important during selection. We can only make educated guesses; for example we believe that they do not like guys with families, whereas in reality a wannabe saying "I am divorced, my ex is a bitch, I am not allowed to see my son, I just want to earn money to secure his future education" MIGHT be the best candidate in their eyes. Similarly, a Green stating "I said X and they let me through" also has to be taken with a grain of salt; the Gestapo officer might not heard it / misunderstood, the candidate might got selected from the committee despite the comment or the week might have been so slow, they were forced to accept said Green.
What is important is to have an honest and realistic reason for wanting joining. You can try and tweak the circumstances a tiny bit, but you can't fool them. And more importantly, you can't fool yourself: if you pretend to be something you are not, you will probably hate your time there and start thinking about alternatives.