All sorts of stories, rumours and theories come from these situations, it could be as simple as respecting the wishes of a dead man (even if they'd not have been respected if he was alive- and of course he could have changed his mind then anyway) and not offend his widow, but it's such a shame the viewers (and the acts who appeared on his episodes) lose out.
When the Mike Smith ToTP editions were during to be shown (ie in repeat and date order) and then were dropped from BBC Four, someone tweeted Sarah a well worded and 'respectful' message asking if it was something to do with Mike, and she replied that it was Mike's wishes that his television work should not be repeated. BBC Four are carrying those wishes out (no matter how frustrating that is to some pop music archive fans around the Internet)
Mike isn't the first or the last to ask for that after his leaving.
Dave Allen had a original broadcast and one full repeat request put on all is television work - which Dave's wife is still honouring.
It's why you don't see full episode series repeats of his work to this day, and Dave even sat with a
VT editor when compilation or best of's were in being produced, so he had final say on which material went into those programmes.
Anyway, back to Ghostwatch..