After this tournamet i can clearly see they won't have problems, FIFA should be worried about their work, not Russia.
Just a few days back, Russia successfully hosted the FIFA Confederations Cup. There was not a single untoward incident, of any magnitude and there was no complaints from anyone. Therefore I believe that Russia will host the 2018 world cup and it will be a great success.
True story man. I have some friends who visited Confederations Cup in Russia in order to support Chile, finally they came back very satisfied with FIFA organization despite the fact Chile lose the game. Anyways they are definitely planning to visit World Cup in Russia. No way to loose the event.