On the occasions where folk have done this, was it with the 'new' type of mixture control or the old?
Mine was in a PA28; the controls are both levers, but feel quite different. It would be hard to mix them up... but I still did
Main reason I did it because I hit overload on my dual-QXC (thanks to a part-time instructor who flew for BA and thought it made him walk on water. Visiting Wycombe sent his ego into overdrive and he criticized everything I did the whole way round - "Stupid Boy!"). After a while I just about lost the ability to fly... nearly killing the engine made him shut up and me snap out of it a bit, so I guess there was some use to it