Banning vape products will just lead to this happening again and again with black market vape products. It needs to be regulated and meet health & safety standards. The concept of vaping nicotine oil exists now, it is not going to go away. We get to choose whether people do it illegally, with greater health risk, or legally with less health risk (if we regulate it properly).
Just a nitpick: there is no "oil" in vape liquid. That would be very bad.
It's typically nicotine, VG/PG (essentially glycerines like you'd use in a fog machine, but medical/food grade), and often a small amount of food flavoring concentrate suspended in the same VG or PG base.
I quit smoking with this stuff and eventually dropped off the nicotine. I made my own liquid because I could source the ingredients myself, control how much nicotine I used, and knew exactly what I was puffing on...something I couldn't say when I still smoked.