T.S. Eliot, who relied on other sources for much of “The Waste Land” (plagiarism or allusion?), famously wrote, “Immature poets imitate; mature poets steal.”
Stealing poems or lines from poems may be bad enough, but rewriting them badly is worse. Returning to T.S. Eliot, Graham observes:
Less often quoted is the next line, “Bad poets deface what they take.” This is what seems to gall many victims of plagiarists: to see their poems reprinted in weaker versions than the original.