To the OP,

I do not think it will keep you out of the job you desire. I think we would all be surprised at the number of pilots with something in their background. Remember, we are discussing pilots! Managements know that; they can accept a youthful indiscretion. Two or three. and well, we have a pattern of not learning. I personally know of a guy (now retired) who listed 2 DUI's and was hired at DAL in '87 (both occurred leaving mandatory squadron functions).

After 9/11 the powers to be had a background check run on all active airline pilots, mechanics, flight attendants and others (remember the mandatory fingerprinting?). There were some nervous employees. At DAL, management agreed to look the other way as long as it was not a felony.