It was many years ago in 1970's (perhaps before some respondents were born) when pilots were airmen and, thank God, allowed to make professional and safe judgements. "If there's doubt there is no doubt" has been around a very long time, and true professionals have always used it to gauge an unorthodox scenario. Has no-one hear never landed on a WIP displaced threshold? Nowadays the youngsters here, or perhaps the rule making bodies, would require a displaced PAPI to carry out such a manoeuvre. The question was asked to ATC; they replied that it would be very helpful, so we did.
For 'Al Murdoch', we didn't land on an occupied rwy. Everything in front of us was un-occupied. (it's Ok Al, tongue in cheek)
End of story; nothing more to add.