I personally don't think the fact that this guy was DQd earlier should always mean that person should never participate, but looking at the answer that was given in this question, while it's an impressive "article", it doesn't really feel like an answer. When takling answering questions in a q&a forum, I feel like the answer should be definite and clear, in this case the article doesn't really answer the question, it's more of a "tibiasecrets" type article.
Then again, in my eyes the entry should be judged based on its quality and not on its entrant, and for me it's a good quality article, but not a good answer.