its not a sin..but its unoriginal...and its not something respected really..if you cant come up with your own shit..then just leave it be.....if u cant think up a personal for somebody in a battle..leave it be..if you cant think up a punchline..leave it be..if you cant come up with 16 bars for a collab then dont do it. it's kind of sad to see people doing that shit and want to consider themselves a hip hop artist or rap artist....why u think P diddy gets no respect besides as a bussiness man..nobody likes him rapping..cuz he dont rap his own shit.