Apparently this is a bad idea, but it is what Standard is all about right now.
With so many powerful 6 drops and above in the format, there are many incentives to get lots of mana in double quick time. If you can get ahead on land, then Titans are just the beginning. We've seen Genesis Wave being cast for 18(!) this weekend already.
Many of the counterspells in the format are happiest when opponents do not have a lot of mana. Spell Pierce and Mana Leak really don't do a lot after Primeval Titan has resolved. They are very mana efficient in the early game at stopping such things from happening though.
So what are the key cards that are being played this weekend to keep the land battles from getting too out of hand? Well, depending on the decks involved, there are quite a few. Tectonic Edge is a powerful choice for pretty much every deck. Having a way of getting rid of Valakut, the Molten Pinnacle is important when the deck that runs it has so many ways of getting terrifying amounts of lands on the board.
For Red decks, Tunnel Ignus is a nice option, if it can dodge Pyroclasm and Inferno Titan. I've already seen at least one game put away this weekend by double Tunnel Ignus rendering Primeval Titan and Khalni Heart Expedition impotent.
More exciting, is the use of Spreading Seas. This common broke out in Worlds in 2009 as a nice answer to Jund decks with their greedy mana bases. These days mana is generally fairly free and easy, but Spreading Seas still does good work. Against Vampires, there are really not that many colourless mana costs, so it can function as a cantrip Sinkhole while dealing with something like Lavaclaw Reaches. It does a fine job of stopping Valakut, and occasionally more. One particularly exciting play with it involves when it comes into play from Genesis Wave. Because Genesis Wave puts Spreading Seas into play, it doesn't leave a window of opportunity for opponent's to respond once the Wave is resolving. This means that it has successfully been put onto a Terramorphic Expanse, to hold off a lethal Valakut activation. Saucy.
Finally we have Leonin Arbiter. In a world where fetch lands, Harrows and Primeval Titans are running rampant, this two mana cat can turn a Blue/White deck already sporting Tectonic Edge and Spreading Seas into quite the mana denial deck. With Mana Leak, Spell Pierce and potentially Frost Titan in the mix, this tempo attack can be very powerful.
Perhaps starting a land war in Asia is not a great plan. Not being ready for one though... that could be worse.