A sativa will need trained or trimmed back to keep her down to 5-6 feet. You may be better off with a hybrid...and a single plant in 4x4. Vents to keep the heat down.
Hair (pistil) color only tells you when the calyx is no longer viable to be fertilized. It has nothing to do with the buzz...and there's plenty of resin production and swelling of the flower to come after the hairs turn. Don't short your production's quantity or quality by chopping too early.
If Customs seized your beans, they would have left you a note telling you they did. They don't have time to chase down seed buyers. I wouldn't worry too much...but I'd be pissed about the thief who ripped off my beans. Bastards.
basically the slower you get to "jar ready" the better. The bud stem should snap cleanly before you put it in jars. At any rate, the "grass" smell should go away after the chlorophyl breaks down.