They should worry...
...if a tin of sardines lands in the middle of their theme park.
An Angry Birds theme park has opened in China where punters can literally catapult cuddly squawkers at green pig balloons scattered among delicately built toy castles. The unlicensed attraction, labelled as the first 3D Angry Birds game, is part of the park's stress-reduction festival that runs this September, CNN Go reports …
First, it wasn't an "Angry Birds them park", but an installation in a theme park.
Second, an article in today's Helsingin Sanomat reports that the Angry Birds installation has already been closed down because of the copyright violation.
http://www.hs.fi/talous/artikkeli/Kiinalaisen+huvipuiston+Angry+Birds+-alue+suljettiin+tekijänoikeusrikkomusten+vuoksi+/1135269465347/