Yup, but even an unused pipe might give the customs agents a reason to search you and your luggage further. Just want to avoid the hassle.
When I was college I was once stopped at the Canadian border, and an immigration official found a pack of EZ Widers in my glove box. They then detained me and my friends inside the building while they tore apart our luggage and the interior of my car. Of course, we weren't stupid enough to be bringing any contraband over the border, but it is a hassle I would rather not relive.





