The unlock tag seems to meet all the criteria for a tag that should be removed - per the recent tag-cleanup initiative:

If the tag falls into any of these categories, it should probably be removed or replaced:

* The tag is only useful when it's combined with another tag. Like [update], [install] or [task].

* The tag does not describe a specific technology or area of expertise. Like [color], [temporary] or [file].

* The tag could mean different things, depending on context. Like [environment], [noise] or [terminal].

* The tag describes an extremely broad topic. Like [software], [technology] or [equipment].

No questions have been tagged unlock, and the tag's wiki is empty.

Can anyone offer a good reason to keep it?