Too many chiefs and not enough......

Too many chiefs and not enough Indians (sorry for being politically incorrect, its just a saying).  Soooo, whilst training have you ever heard "that won't work on me," or "I almost had you."   SERIOUSLY.   I have heard this not only directed at myself but I have heard other students in class say that to each other.  White belts no less!   I have noticed that this is a beginner trend usually; like when white belts who have been training for a few months roll with a brand new white belt.  They say something like "that armbar won't work on me." Okay, that brand new student (may I remind everyone we were ALL beginner white belts once) is attempting a technique that he/she has just learned.  There is most likely no transition into it, it may be very "robotic," by the book, or it may be incorrect.  He or she just learned the technique.  If you see something wrong, grab the instructor and get it fixed.  If you feel like the person can't break your posture and they aren't going to get the armbar, then ok, keep your mouth shut and keep working.  It is so disrespectful and discouraging to hear something like this, especially to brand new students.  At Traven's place I have never heard any of the higher ranks say this.  Everyone is super respectful and mindful of their training partners.  If for instance I try an armbar on a higher rank and he knows it is not going to break his posture or be able to sink in, I will either pay for my mistake and learn that way or I get helpful advice like "hey instead of this, try this instead," or "this is a good way this works for me."   White belts and most blue belts for that matter do not have the credentials or knowledge base to give out this kind of info."  So instead of being disrespectful grab an instructor or just keep your mouth shut and do some Jiu Jitsu. I heard the "I almost had you" the other day.  I was rolling with a relatively new white belt and had double unders and was attempting to pass.  He locked his legs together and though if he squeezed his legs I would tap.  It was tight on my head, but I ripped out and passed.  Then he said "I almost had you."   NICE.