Btw, hitting your opponent may work well at lower levels. 4.0 and above that ball will come back into play.
Right but I also think because of that, those players have a general knack for putting the ball somewhere knowing that it wont come back (not to either player).
At 3.5 not everyone has that option, sometimes if you know it's not coming back if you aim it toward the person, then there is nothing wrong with that.
I think "trying to hit them on purpose" is wrong, but hitting it in their general area is not a big deal.
I dont think you have any responsibility to make sure the ball doesnt hit someone, and you shouldnt even have to "be careful" not to hit it near them. Your opponent has a bigger responsibiilty to not let their partner get whacked in the first place.
If someone (even a woman) was THAT afraid of getting hit, or you are worried that it's that harmful then they better not play the net then. Stay at the baseline, it's much safer back there.
And as far as the pro's, I was at the 1998 RCA Championship Finals between Agassi, and my hero at the time Alex Corretja.
One one point Corretja came to the net and Agassi who was well behind the baseline took aim and fired it dead at him. The ball hit him in the chest and he got the wind knocked out of him and he actually fell over.
Agassi came over and made sure he was okay, and after a few minutes he was. (Corretja went on to win in 3 sets)
Is Agassi wrong? No he is not, they are playing tennis, he's a pro but even he's trying to just put the ball somewhere to make sure it's not coming back. He's not trying to injure anyone and he probably has no motive for hitting him, but it's just part of the match.
If there is anything bad to say about the OP's position, it's just the weirdness about some of these mixed doubles leagues in general.
You can have a real 3.0 player on the same court with someone who is a sandbagging 4.5 player and the 3.0 player at the net is going to have a hard time dealing with even some of the simple shots, much less trying not to get hit.
Yet it's not a social match or a mixer or anything, it's an actual league where people are trying to win so they can get the covented mixed doubles pen or water bottle or liquid soap dispenser (might as well be functional).