Can iTunes Radio's 2-hour inactivity limit be removed?
Is it possible to keep iTunes Radio playing without stopping after 2 hours of inactivity? Can be annoying at a party.
iPhone 5, iOS 7.1.1
No it cannot.
http://support.apple.com/kb/TS5181
Why does the music stop playing after two hours?
iTunes Radio will time out if you don't interact with your system or device for approximately two hours. If this happens, simply access iTunes Radio again and choose a station to continue playing.