Probably because they were too full of cursing, anybody that has ever had to work helpdesk can tell you there is nothing more pissy and foul mouthed than an irate customer.
But this being Zynga, the same bunch of numbnuts that hired the "just deal with it" guy from MSFT to be their new CEO? honestly this doesn't surprise me. what DOES surprise me is how long they have managed to stay in business when their entire "business" is built around ripping off others IP. Go look up the papers EA filed against Zynga and you'll see pretty much every "game" they have is just stolen property, they'd find some indie game that is starting to get buzz and have some Chinese coding house whip up a knock off (some times so exact that even the artwork is damned near pixel perfect copies) which they put up on FB reap the rewards.
Personally as much as I hate the current IP minefield it just goes to show the indie game devs are easily fucked over, after all you couldn't just take the exact same script that they used for the latest Transformers, change the names by one letter (bumblebee becomes rumblebee and so on) and not get sued, or take the latest hit song and record a note for note knockoff and slap it on iTunes without getting busted, but Zynga can take some indie devs life's work, change a couple of sprites and the name and then make a pile of cash without worrying about squat. Hell if it weren't for them getting greedy and going after EA properties most of us would have never known its just a rip off house.