An odd acronym that is red x. I didn't even know what it was until I googled for like three minutes. Could get in the way of a legitimate acronym that means something different. Example: 'Bidirectional Forwarding Detection', which would commonly be shortened to "BFD," would be blocked. Admins/cms can clearly tell if one is trying to use the originally blocked meaning.
(A) Unblock: 8
(B) Keep Blocked: 13
(C) Neutral: 3