Comment Don't lie (Score 4, Informative) 499
Just so.
Look, basically three things get you into trouble during a government background check:
1. You *currently* participate in an organization trying to harm the United States Government.
2. Anything about yourself or your family life leaves you vulnerable to blackmail.
3. You conceal relevant truth, lie, or exhibit a pattern of deceit and/or theft.
Pretty much nothing else disqualifies you for work for Uncle Sam. You can even get a security clearance.
So, DON'T LIE. Err on the side of telling the interviewer more than he asked. Especially if it's embarrassing. An open book is easy to read and it's incredibly hard to blackmail someone who is never too embarrassed to seek the local security officers' help.