i seriously doubt if your failing a test for one corporation will affect other job prospects.There is a ctually a law,in my state anyways called degredation of character.One employer or ex employer cannot call a buisness where u are contracted or employed and officially bash your name,or say you are a drug user.Now if this nazi knows your new employer personally,then ofcourse you may be in for a dissapointment. All in all if you get tested and fail get clean using the tips posted on this site.Theres people in your situation that found a way.U can too.Oh yeah by the way as far as background check,only criminal records and driving records are the two things that remain on your background.No failing tests for a job,nothing like that.