I played a 7.0 Mixed doubles match last night and our male opponent, a 4.0, had one of the hardest overheads (and serves) I have played against. In spite of this, my partner and I managed a win. In the middle of the match my partner was in the center of the duce service box and I hit a lob a little short and the male opponent tracked it down just beyond the service line and nailed my partner full force . A simple apology was given but I had to take umbrage and I calmly told him "when you hit that hard you are obligated to control it". They had a fit! I have heard this issue back and forth, and of course we have all hit someone and felt bad about it but, I believe that if you are wielding a weapon that can clearly injure you have an obligation to control it, or not use it. Like firing a weapon without taking aim. Am I wrong?