[ninjaroar]

As a Canadian, i've actually never thought of Iran as any more 'adventurous' of a place to visit than somewhere like Peru or India or Cambodia. Lots of mainstream adventure tourism companies have tours there (e.g.: G adventures, exodus, etc) It has a reputation of being a very friendly place full of hospitable people. It's always been on my 'bucket list' of places to visit one day.

However, if a visit means i'll get grilled more than usual every time I visit the US, then I'll likely refrain from visiting. So, yes, the order will reduce tourism.

[chimeracoder]

The US explicitly allows people to get a second passport to allow them to visit countries without facing this issue. For example, if you want to visit Lebabon, you can get a second passport if you later want to visit Israel.

I don't know if Canada or other countries do the same thing.