The recent controversy regarding King and trademarks has been well documented (you can start here and work your way back), but it seems that recent events have caused one developer to come out of the woodwork and call King for their perceived double standards.
In a nutshell, King has been aggressively pursuing trademark claims to protect their various IP (Candy Crush Saga et al.) from cloning. This justification for their recent actions (including attempting to block Stoic from trademarking The Banner Saga) has caused developer Matthew Cox to speak up about an experience he allegedly had with the studio some time ago.
You can read the full story here, but in essence Cox claims that he and his studio took their game, Scamperghost, to King in 2009. The indie dev states that before contracts were signed the team got a better offer from another publisher and took their game with them, and in response to this Cox claims that King hired another studio to clone their game.
Pac-Avoid was released around the same time as Scamperghost, and Cox provides a couple of emails to back up his case, including correspondence with the developer of Pac-Avoid who explains that Lars Jörnow of King basically hired them expressly to clone the game and bring it to market first.
Cox concluded his post by saying: "King.com, however, showed no respect for other people's intellectual property when they made a direct, blatant clone of Scamperghost. Now they've trademarked "Candy" and are using their massive legal power against other small competing developers. A bit of a double-standard, eh?"