That works only in the DA if you are fighting the same guy over and over. How do you know who the other guy is in the MA during a base capture attempt or defense? The other reason it does not work is that the other guy welcomes it even if it means death, as long as he gets a chance to take you down with him.
The same people often reup from the same base. It's easiest to see if you see something a bit unusual at a base and shoot it down, like a 110, and then see another 110 upping almost immediately, it's a fair guess that it's the same guy. The other guys can be a bit harder to detect if they fly something common, but they're generally still working the same area.
Most of the time I look at it purely as it relates to my survival. If I'm 1v1, I'll almost never HO. 2v1 I probably will not HO unless I'm getting really desperate. On a good day, my SA allows me to give 2 guys a run unless they're working well together.
Probably the greatest chance you have to be HOed by me is if I am 2v1 and doing alright, and you are coming in looking for a HO from the direction I am heading away from the other two. At that point, I find it is worth the risk of being faceshot to keep it at 2v1 instead of making it a 3v1.
If the odds are 3v1 or greater, I am taking whatever I can get, sorry.
I am also not going to deny, if you are the fourth or fifth guy in the last half hour or so that I have seen heading straight in on me to try to face shoot me, sometimes I will do it just out of spite. I know it gives me great pleasure to show the guy face shooting everything he can see in the 110 that those big guns actually need to hit their target to do damage. I'm sorry, it is one of my failings as a human. I believe I can live with it.

Wiley.