Replying to Recording music at live shows (legal??)

well me and my friend are gonna go to a concert and I suggested that we record it on his minidisc player. He wouldn;t though because he was worried about getting cought and stuff. what is the deal, will we get cought if we record a live show, is it ilegal? (it is Anti-Flag so I don;t think that they will care at all but he still says that there are people that would sue us...)
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Grand master of the poser-geeks cult


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