My brother once told me that anyone who takes kids on the back of their bike should be charged with attempted manslaughter!!
-This from a guy who once towed my broken down car at 90mph on 10' of rope
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The frightening thing is, he's quite "normal" and reflects the views of quite a large cross section of society. (basically either stupid or ill-informed)
I would say that anyone who drives recklessly (car or bike) should be prosecuted but speed is, as ever, not really the issue.
110mph on an empty road sounds entirely safe to me, pillion or not.
I take friends and their kids out for rides and ride with their safety in mind. It's not difficult really to work out what's safe and what isn't.