Sussex Runner /DF3 the thread is about whether walking a marathon is easier than running one. It is not about whether you should walk/run. I have done both in as much as I walked the moonwalk (clue in title I think) and run marathons. Therefore possibly more qualified to coment on original post than both of you.
Yes, for the moonwalk, you do some walking around a park but a lot is on the road. Yes I did walk it in a bra (and thong), Fortunately only got one proposition