Why not? Because the iBox is collaborative, free form text, not structured into fields. Any structure that is created is wholly up to the collaborating users.
of course iboxes should only include facts, not opinions, but that's not happening.
One man's fact is another man's fiction, and vice versa.
EVERYTHING posted here is considered to be opinion. It is the privilege and duty of each reader to decide the veracity, credibility, legitimacy, meaning and relevance of what they read for themselves. As it should be.