Fail on not-set cookies?

If I am in `mydomain.com` and attempt to `Cookies.set('foo', 'bar', {domain: 'ANOTHERdomain.com'})`, nothing will happen, as I understand it.

In other words, the write silently fails. Wouldn't it be good to do some sanity checks regarding secure/domain/path options for ensuring `.set` always does what we believe to?
