MEMEBURN - July 30 - Bang With Friends, the Facebook app that aids in casual sex hookups, was banned from the Apple App Store in May and now Zynga is taking it on for trademark infringement. Zynga has filed a complaint suggesting that Bang With Friends selected its name with “Zynga’s game trademarks fully in mind,” and that its name contravenes the company’s trademark, covering titles including “Words With Friends” and “Chess With Friends. Bang With Friends has yet to respond to the allegations, but we can’t imagine that it will back down quickly. Its fortunes, with upwards of 1.1M users, also appear to still be on the up, while Zynga’s are going very much the other way. In June, Zynga was forced to slash 18% of its staff as it continues to battle to adapt to mobile gaming.