Yeah, but it kind of is possible to travel through time. If you get into a Spaceship that can reach even 0.1c and shoot around space for a bit then the time of travel is going to be much less then the time observed on Earth.
You all remember Gliese 581 g, right? To fly a ship there based on current technology it will appear to take 200 years, but from an observer within the ship it will only take 10. Travelling there and back will jump you ahead by 400 years Earth Time, while you only age 20. Supposedly, I haven't done the math myself yet, but it seems to work.
So it is possible to travel forward in time.
No doubt Smolyaniov knows this, and the article is horribly misconstrued to appeal to most Escapists.