Do you really think the McCanns care if they and/or their children are referred to by their initials? Likewise for KM's book? The McCanns have lost a child in tragic circumstances; many people on and offline think they accidentally killed their daughter and covered it up; they are involved in a costly and exhausting legal battle. Please put my "childish" comments into perspective.
As far as I know neither Kate nor Gerry McCann are members of the forum and have expressed no opinion one way or another regarding your posting style.
Some forum members have expressed opinions ... myself included.
I can appreciate that there may be some gain in initialising in context; few would have to puzzle over, for example ... SY or PJ ... but not HEH unless previously referenced in the post by the full name of Hoos Evert Hendrik which I believe to be protocol.
"book" in my opinion is harder to type than "Book" and therefore comes into no category other than for your own particular reasons best known to yourself.
I believe it devalues what you are posting and I for one switch off when I see it.