You can't predict who they will reach out to you. Also, lying during a federal background check is ... dangerous, to say the least. Remember, it's really hard to produce lies that stand up to repeated questioning, especially lies that span several people.

if they're lying about weed they're lying about... what else? theft? fraud? violent crime? domestic abuse?

the point is that there are no surprises about a candidate, not that some guy they've known since 3rd grade will cover for them.

cuz their job won't involve talking to people they've known since 3rd grade