One might as well blame the <input> box. No, seriously -- there's a context-free aspect ("Write a comment...") of a blank comment box that invites all range of

One might as well blame the <input> box. No, seriously -- there's a context-free aspect ("Write a comment...") of a blank comment box that invites all range of interaction, positive and negative, relevant and not. Imagine if instead of a blank <input> box, users were prompted with a question ("Do you also like ice cream?") or statement ("Leave your condolences...") that guided the relevancy of the response.