I am a bit in the middle...I think the only thing that will truly be difficult to get if FDA gets involved (or the tobacco companys with the FDA) is the nicotine, so I started stocking (have about 120 ml of 100 mg in PG) up a bit. I am also working on my hubby and two sons who smoke, so I'm working on DIY stuff a little at a time, as well. I figure I'll keep replacing what I use until I hear that a ban is getting closer to reality.
As far as the actual hardware, I would guess that they couldn't ban it if it is used as something else, say a diet aid for those who "inhale the sweets so they don't eat".
All that being said, I'd like to order cartos for 510 in bulk (again, with the hopes my boys and hubby will switch over), so anyone who would like to share info with me - please pm me!