I'm pretty sure CCI adds scents to their inks, which is a nice touch. I've also been told by someone who has been using discharge since the old days that you can add a few drops of scent from a Glade plug in cartridge to discharge inks to help with the issue. Those plug in scents are heat activated.
In regards to Matsui inks, the smell will dissipate after a day or two so if its a concern with customer satisfaction just let them sit for a couple days in the box before delivery.