I agree. Despite the guidelines, I can see this potentially being used to spread rumors, gossip, lie, or just stuff that's plain unflattering on people. I doubt many people will be actively monitoring their Biographicon profile and this content could go undetected for a while, causing the subjects real harm.

i don't think it'll be particularly harmful. i think in the long term the wiki's reputation as a reliable source information may suffer. when something is well known not to be reliable, it doesn't have much of a way of inflicting harm.