Serious Question for Federal Security Clearance

[Hooahguy]

Ice,
because Im seriously looking into a job in the FBI, Ive done a lot of research into top secret security clearances, including talking to agents and people who do the background check. In fact, its because of the TSSC that I decided to drop my Israeli citizenship so I wouldnt have to serve in the IDF and as a result forfeit my chances of getting into the FBI.
They will ask if you have smoked and if you were a habitual user.
How long ago was the last time you smoked? And were you a habitual user in the last 10 years (they will ask this)?
If it was once or twice a long time ago, even a year ago, it wont affect too much, as long as you arent applying for a job in the DEA, but if you have within the past year it might cause them to think lower of you.
In short, I wouldnt worry too much about it, but by all means, tell them this upfront. Disclosing this late in the game is grounds for dismissal.
Hope this helped.

By the way, a TSSC goes all the way back to age 16 and is incredibly thorough. Just a heads up, might want to make sure your social networking sites doesnt have any incriminating pictures or whatnot.

EDIT: Id also go through this site and remove anything incriminating. You never know what they might turn up and ask you about during your polygraph. Like how you are a member of the .Org pot policy group or w/e that thing is.
I also found the FBI drug policy, which is similar to most Federal agencies drug policies.