I hate to say it, but your biggest complaint has nothing to do with the game, and everything to do with the people in it.
Yes, I'd be willing to put money down that in real life, there were far less kills by HO. However, that is because the fear of DEATH generally caused a pilot to be wary of getting anywhere near an opponent's guns.
Unfortunately, this is a game. The risk of real death is not there, and you will have people using tactics that would not have worked quite as well in real life. Instead of complaining about the HO and saying "something must be done", how about some ideas for stopping it?
Also, do not confuse a HO with someone coming in to help a squad/country mate. Heading towards each other on merge is a HO. Happening to loop into the direct path of a BnZ'ing Typhoon, trying to clear his countrymate's 6 is NOT. There's a subtle difference, even though the result generally feels the same.