When I refer to flopping I am not talking about falling as a result of contact. In fact I think players should be taught how to fall. I've seen knees and ankles hurt simply because a player tried not to fall after contact and stuck a leg out in that attempt only to be helped off the court. Better to get a bruise on one's ass than to injury a leg joint in an attempt to stay upright. And falling backward helps to lessen the jolt of contact.
A year or two ago or so I posted something similar. Falling is an art form. Most people get hurt falling because they fight it and in so doing they put their extremities at risk. When a fall is inevitable you need to flex your joints and assume something close to the fetal position and try to hopefully roll into it landing on your side on your way to your back. Sounds ridiculous? Over the years it has served me well in sports as well as thousands of miles of swamps, hummocks, rocks, ice, weeds, tree roots etc.