Rather Annoying

I hate it when books or articles state quite explicitly that they are going to "present the facts" just as they are, without any bias or hysteria, letting you choose your own viewpoint after seeing the hard facts, and then go on to end with a major climax which culminates in the author stating, very decidedly, what his/her opinion is and how anyone who cannot agree with them is obviously an unreasonable, vindictive creature. If your writing is going to be persuasive, please do not market it as an expository one (and particularly not on the front cover).