When I was 18-19 I had about 7-8 tickets. I was hired by a regional in 2006... The last violation I had was 2001, and I've been clean since. I was asked during the inveterview by the 2 Capt. "Have you ever had a moving violoation?" my respose was "How far do you want to go back?" I think it was the fact that I've been clean eversince I got to college, and showed improvements.
It depends on who you are interview with and how HR feels about moving violation.