According to a site, there are defensive strategies which are designed to defend a position that the website already hold. This also creates barriers to the entry of new entrants in the market and ensuring that you may gain such position that no other can attack you and snatch your position. One of the most interesting strategies are the flaking strategies. In this case you can befoul your competitors or your enemies that there is no real threat for them and in the last moment when they realize it is too late for them to take necessary actions.
http://www.selfseo.com/story-19722.php