[GFischer]

It is effective. I know of people that have changed their travel plans to avoid France, and apparently they weren't alone:

http://www.dailymail.co.uk/news/article-3338173/Terror-attac...

Terror attacks in Paris means visitor numbers across Europe tumble and France has already lost £1.4bn in tourism revenue

[icebraining]

Yeap. Tunisia was hit even harder, with y/y growth dropping from around 10% to -90% in the months after the attacks.