Yes I have heard of plagiarism. Plagiarism is 'the unauthorized use or close imitation of the language and thoughts of another author and the representation of them as one's own original work.'
If your concern is that I am claiming to be the original author of this poem, 'THE HELLBOUND TRAIN', then I can assure you that is not the case. That is why 'ANONYMOUS' is at the bottom. I don't know who wrote it; I simply wanted to share it with others on hubpages. It was shared with me by someone who didn't know who wrote it so I passed it on via hubpages.