 :::Like much of Wikipedia, it's really quite disorganised. If an IP has been blocked as an open proxy I think it is right to label it as such, so it can be checked later (for unblock) or 'imported' to other Wikipedia chapters/languages. The template is merely descriptive in this respect - it has been blocked because it's thought to be an open proxy (as read in the block log). If an admin has blocked it for being an open proxy there are two options: Either trust the admin and add the label (in the way a bot would do), or request that it gets re-checked by WP:OP. If it is probably an open proxy (e.g. this vandalbot), but it has only been blocked for vandalism and not as an open proxy, I would suggest it gets listed at WP:OP. WP:OP is the definitive place to determine whether something is an open proxy, but quite a few admins also know how to identify open proxies (as some do not).    