Ok, this is a huge slippery slope. Recording the radio is not legal in most countries, including the united states. But it semi legal to have the recordings, because of fair use. But that only covers non digital media, ie tapes. Once you move to digital copies the world changes very quickly. With digital the only legal copy has to be on DAT tapes that are probably not made any more.
Ok, now about internet radio, it is 100% illegal to copy, record, and reproduce any digital radio copy. Any means that you would use to make a copy of the radio station, will violate the DMCA, any means, period, end of subject.
Now here is the stupid part. Even if you don't crack/hack the copyright protection it is still 100% illegal. All they have to do is show intent of copy protection, they don't actually have to make it effective. So any means to copy the digital distribution, ie internet radio, is illegal, even if you don't have to do anything to copy it.