From what I can see in [the spec](http://yaml.org/spec/1.2/spec.html#c-non-specific-tag), there are cases where you'd want to prevent the tag from being resolved (i.e. the string from being parsed) as anything but a built-in YAML type, like when you've defined your own custom datatypes. I don't think we're in that position, so this should be fine.

And it doesn't seem to have broken anything =)