What you're doing is more accurately called a boycott, and it's completely possible because it's completely your prerogative. I doubt it could gain much traction, but hey, whatever works for you. I personally feel like that's a little bit extreme, as it's going to hurt local businesses who have nothing at all to do with their government's rulings.

On a sidenote, Indonesia did not ban Bitcoins. They banned using Bitcoins for transactions, which basically means you can't pay with it. You can hold it, you can trade it, and you can buy it. You simply cannot use it in place of their currency. You may want to keep your Indonesian supplier for now.