When do mentors go too far?

[Spikey]

Having been to several regionals, and having competed in robotics for four years I have noticed how some teams are completly dominated by thier mentors. When you walk around in the pits instead of students working on the robot you see 4-5 adults working on the robot you begin to wonder what is going on with FIRST. I have seen adults who are a teams scouts, and builders, the students just sit in the stands and drive the robot. I have to ask myself when do mentors go too far. It can be very obvious what is a student built robot, and a robot that has been by adults.
As a team how much involvemnt do your students have? What is the point of robotics if adults are the ones designing, engineering, building, and servicing the robot? When a robot breaks down during a practice match and 4 adults rush out to fix it I ask myself why arn't the students involved?
I have seen pits where students are not even allowed to touch the robot, the adults handle all the mantiance. This problem has been going on for years, and I wonder what everyone else thinks about this subject of adult involvement.
My team is quite small and during a regional almost every student has something to do. People often ask us why we arn't cheering during the competition, and I tell them all of the kids in the stands are busy scouting. We had 9 people who filmed and wathced every single robot in every single match. The rest of our students were in the pits servicing the robot while our mentors stood back and gave pointers from time to time.
I am worried FIRST has become more lopsided with teams who have student built robots vs. adult built robots. I feel as if for some teams that FIRST is about adults building a robot for the kids, then having the kids drive the robot, when do adults and mentors go too far?