If you have a hatchback
1.Get a big cardboard box.
2.Tell your other half you are dropping off something for somebody.
3. Drop the rear seats to put large box in boot.
4. Hide any bought goodies under the rear seat in the foot well.
5. Tell other half the person wasn't there.
6. Drive home with hidden guns.
Simple

I like the Idea of BBS badges so we can recognize each other. I would suggest a standard format maybe the BBS logo with our user name underneath.