This is a grief. No doubt about it. About 90% of my engagements with an enemy who is co-alt and heading directly for me end with me tore up in pieces. I'll come into a fight looking for someone to pick or merge with and there is always some who wants to fly directly at me with every intention of putting lead into my face. At about 1k from closing in with the enemy, I'll veer off to the right and deliberately try to put myself off from HO'ing him in order to just merge with him and begin the dogfight. But no, the jerk stays on the war path and just turns into me, guns a blazing, and forces me to fly through a hail of bullets. I mean I'm doing everything i can to avoid the HO (barrel rolling, changing alt) and I still get pegged. How does anyone ever fight and win against this without getting into a jousting match with the bigger guns winning? Or do I need to get with everyone else and start HO'ing as well because its usually the higher ranking fighters who do this mess.
You've got to live through the merge to get to the "good stuff", that's for sure.
Like grizz says, getting under your opponent is a great way to do that, and moving slightly to the left or right helps even more.
If you think about it, getting under him means he now has to lead you for the shot, since you're not flying directly at him. To do that with you in a lower position, he needs to push the stick forward, which makes the shot much tougher (if he can even do it without redding out...) As you get closer to him, he needs to push the stick even harder forward...
Now, with you slightly to one side, if he rolls his wings toward you, pushing the stick forward makes him turn
away from you, lol!
All that adds up to a shot that's really pretty hard to make, which allows you to survive long enough to begin the fight... As you pass under his nose you can begin an immelman or other reversal.
Another key point in avoiding the HO is to recognize the situations that will lead to it sooner, and "adjust things" to foil it. I honestly expect my opponent to go for the HO at every single opportunity, and just fly to make it fail. If he
doesn't go for it, that's fine, but I never count on that.
Avoiding the HO takes some practice to master, but once you figure it out, you'll probably reach a point where you seldom get hit by it.