@HodofHod The first of your four questions was "What's the source for this?", andthat answer directly answers that question -- part of it. (The part that discusses being "cut off", not the
cherem.) I am inclined not to delete it. That said, you can
always flag something if you think it's deletionworthy (or if you think a question is closureworthy). But do check out the
faq re what's deletionworthy/closureworthy.