Hi, YOSHIE,

If that is the reason for his/her ban, then, it is not a valid plagiarism case. Member did cite its source:
Inculcate in mind that when integrating a quotation into your text usually involves two elements (source):

• A signal that a quotation is coming–generally the author’s name and/or a reference to the work
• An assertion that indicates the relationship of the quotation to your text

In this case, Khilone7’s post has the author’s name attached.

Note: If the case is also common knowledge, information given by a certain poster does not generally have to be referenced, as I have cited on this post.

theymos or Cyrus can check if there are some other reasons on this case. As for me, this is an invalid plagiarism case (if YOSHIE's post is the reason).

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EDIT:
Now, that's a valid one.